Gruntfile.js adapted from Yeoman Generator Webapp to handle Jade compilation.

Gruntfile.js

// Generated on 2014-03-14 using generator-webapp 0.4.8
'use strict';

// # Globbing
// for performance reasons we're only matching one level down:
// 'test/spec/{,*/}*.js'
// use this if you want to recursively match all subfolders:
// 'test/spec/**/*.js'

module.exports = function (grunt) {

    // Load grunt tasks automatically
    require('load-grunt-tasks')(grunt);

    // Time how long tasks take. Can help when optimizing build times
    require('time-grunt')(grunt);

    // Turn on the stack trace by default
    grunt.option('stack', true);

    // Define the configuration for all the tasks
    grunt.initConfig({

        // Project settings
        config: {
            // Configurable paths
            app: 'app',
            dist: 'dist'
        },

        // Watches files for changes and runs tasks based on the changed files
        watch: {
            jade: {
                files: ['<%= config.app %>/{,*/}*.jade'],
                tasks: ['jade']
            },
            bower: {
                files: ['bower.json'],
                tasks: ['bowerInstall']
            },
            coffee: {
                files: ['<%= config.app %>/scripts/{,*/}*.{coffee,litcoffee,coffee.md}'],
                tasks: ['coffee:dist']
            },
            coffeeTest: {
                files: ['test/spec/{,*/}*.{coffee,litcoffee,coffee.md}'],
                tasks: ['coffee:test', 'test:watch']
            },
            gruntfile: {
                files: ['Gruntfile.js']
            },
            compass: {
                files: ['<%= config.app %>/styles/{,*/}*.{scss,sass}'],
                tasks: ['compass:server', 'autoprefixer']
            },
            styles: {
                files: ['<%= config.app %>/styles/{,*/}*.css'],
                tasks: ['newer:copy:styles', 'autoprefixer']
            },
            livereload: {
                options: {
                    livereload: '<%= connect.options.livereload %>'
                },
                files: [
                    '.tmp/{,*/}*.html',
                    '.tmp/styles/{,*/}*.css',
                    '.tmp/scripts/{,*/}*.js',
                    '<%= config.app %>/images/{,*/}*'
                ]
            }
        },

        // The actual grunt server settings
        connect: {
            options: {
                port: 9000,
                livereload: 35729,
                // Change this to '0.0.0.0' to access the server from outside
                hostname: 'localhost'
            },
            livereload: {
                options: {
                    open: true,
                    base: [
                        '.tmp',
                        '<%= config.app %>'
                    ]
                }
            },
            test: {
                options: {
                    port: 9001,
                    base: [
                        '.tmp',
                        'test',
                        '<%= config.app %>'
                    ]
                }
            },
            dist: {
                options: {
                    open: true,
                    base: '<%= config.dist %>',
                    livereload: false
                }
            }
        },

        // Empties folders to start fresh
        clean: {
            dist: {
                files: [{
                    dot: true,
                    src: [
                        '.tmp',
                        '<%= config.dist %>/*',
                        '!<%= config.dist %>/.git*'
                    ]
                }]
            },
            server: '.tmp'
        },

        // Compile Jade to HTML
        jade: {
            options: {
                pretty: true
            },
            dist: {
                files: [{
                    expand: true,
                    cwd: '<%= config.app %>',
                    dest: '<%= config.dist %>',
                    src: '*.jade',
                    ext: '.html'
                }]
            },
            server: {
                files: [{
                    expand: true,
                    cwd: '<%= config.app %>',
                    dest: '.tmp',
                    src: '*.jade',
                    ext: '.html'
                }]
            }
        },

        // Make sure code styles are up to par and there are no obvious mistakes
        jshint: {
            options: {
                jshintrc: '.jshintrc',
                reporter: require('jshint-stylish')
            },
            all: [
                'Gruntfile.js',
                '<%= config.app %>/scripts/{,*/}*.js',
                '.tmp/scripts/{,*/}*.js',
                '!<%= config.app %>/scripts/vendor/*',
                'test/spec/{,*/}*.js'
            ]
        },

        // Mocha testing framework configuration options
        mocha: {
            all: {
                options: {
                    run: true,
                    urls: ['http://<%= connect.test.options.hostname %>:<%= connect.test.options.port %>/index.html']
                }
            }
        },

        // Compiles CoffeeScript to JavaScript
        coffee: {
            dist: {
                files: [{
                    expand: true,
                    cwd: '<%= config.app %>/scripts',
                    src: '{,*/}*.{coffee,litcoffee,coffee.md}',
                    dest: '.tmp/scripts',
                    ext: '.js'
                }]
            },
            test: {
                files: [{
                    expand: true,
                    cwd: 'test/spec',
                    src: '{,*/}*.{coffee,litcoffee,coffee.md}',
                    dest: '.tmp/spec',
                    ext: '.js'
                }]
            }
        },

        // Compiles Sass to CSS and generates necessary files if requested
        compass: {
            options: {
                sassDir: '<%= config.app %>/styles',
                cssDir: '.tmp/styles',
                generatedImagesDir: '.tmp/images/generated',
                imagesDir: '<%= config.app %>/images',
                javascriptsDir: '<%= config.app %>/scripts',
                fontsDir: '<%= config.app %>/styles/fonts',
                importPath: '<%= config.app %>/bower_components',
                httpImagesPath: '/images',
                httpGeneratedImagesPath: '/images/generated',
                httpFontsPath: '/styles/fonts',
                relativeAssets: false,
                assetCacheBuster: false,
                bundleExec: true,
                require: ['breakpoint', 'singularitygs']
            },
            dist: {
                options: {
                    generatedImagesDir: '<%= config.dist %>/images/generated'
                }
            },
            server: {
                options: {
                    debugInfo: true
                }
            }
        },

        // Add vendor prefixed styles
        autoprefixer: {
            options: {
                browsers: ['last 1 version']
            },
            dist: {
                files: [{
                    expand: true,
                    cwd: '.tmp/styles/',
                    src: '{,*/}*.css',
                    dest: '.tmp/styles/'
                }]
            }
        },

        // Automatically inject Bower components into the HTML file
        bowerInstall: {
            app: {
                src: ['<%= config.app %>/{,*/}*.jade'],
                ignorePath: '<%= config.app %>/',
                exclude: ['<%= config.app %>/bower_components/bootstrap-sass/vendor/assets/javascripts/bootstrap.js', ]
            },
            sass: {
                src: ['<%= config.app %>/styles/{,*/}*.{scss,sass}'],
                ignorePath: '<%= config.app %>/bower_components/'
            }
        },

        // Renames files for browser caching purposes
        rev: {
            dist: {
                files: {
                    src: [
                        '<%= config.dist %>/scripts/{,*/}*.js',
                        '<%= config.dist %>/styles/{,*/}*.css',
                        '<%= config.dist %>/images/{,*/}*.*',
                        '<%= config.dist %>/styles/fonts/{,*/}*.*',
                        '<%= config.dist %>/*.{ico,png}'
                    ]
                }
            }
        },

        // Reads HTML for usemin blocks to enable smart builds that automatically
        // concat, minify and revision files. Creates configurations in memory so
        // additional tasks can operate on them
        useminPrepare: {
            options: {
                dest: '<%= config.dist %>'
            },
            html: '<%= config.dist %>/index.html',
        },

        // Performs rewrites based on rev and the useminPrepare configuration
        usemin: {
            options: {
                assetsDirs: ['<%= config.dist %>', '<%= config.dist %>/images']
            },
            html: ['<%= config.dist %>/{,*/}*.html'],
            css: ['.tmp/styles/{,*/}*.css']
        },

        // The following *-min tasks produce minified files in the dist folder
        imagemin: {
            dist: {
                files: [{
                    expand: true,
                    cwd: '<%= config.app %>/images',
                    src: '{,*/}*.{gif,jpeg,jpg,png}',
                    dest: '<%= config.dist %>/images'
                }]
            }
        },

        htmlmin: {
            dist: {
                options: {
                    collapseBooleanAttributes: true,
                    collapseWhitespace: true,
                    removeAttributeQuotes: true,
                    removeCommentsFromCDATA: true,
                    removeEmptyAttributes: true,
                    removeOptionalTags: true,
                    removeRedundantAttributes: true,
                    useShortDoctype: true
                },
                files: [{
                    expand: true,
                    cwd: '<%= config.dist %>',
                    src: '{,*/}*.html',
                    dest: '<%= config.dist %>'
                }]
            }
        },

        // Copies remaining files to places other tasks can use
        copy: {
            dist: {
                files: [{
                    expand: true,
                    dot: true,
                    cwd: '<%= config.app %>',
                    dest: '<%= config.dist %>',
                    src: [
                        '*.{ico,png,txt,svg}',
                        '.htaccess',
                        'images/{,*/}*.webp',
                        'styles/fonts/{,*/}*.*'
                    ]
                }]
            },
            styles: {
                expand: true,
                dot: true,
                cwd: '<%= config.app %>/styles',
                dest: '.tmp/styles/',
                src: '{,*/}*.css'
            }
        },

        // Generates a custom Modernizr build that includes only the tests you
        // reference in your app
        modernizr: {
            devFile: '<%= config.app %>/bower_components/modernizr/modernizr.js',
            outputFile: '<%= config.dist %>/scripts/vendor/modernizr.js',
            files: [
                '<%= config.dist %>/scripts/{,*/}*.js',
                '<%= config.dist %>/styles/{,*/}*.css',
                '!<%= config.dist %>/scripts/vendor/*'
            ],
            uglify: true
        },

        // Run some tasks in parallel to speed up build process
        concurrent: {
            server: [
                'compass:server',
                'coffee:dist',
                'copy:styles'
            ],
            test: [
                'coffee',
                'copy:styles'
            ],
            dist: [
                'coffee',
                'compass',
                'copy:styles',
                'imagemin'
            ]
        }
    });


    grunt.registerTask('serve', function (target) {
        if (target === 'dist') {
            return grunt.task.run(['build', 'connect:dist:keepalive']);
        }

        grunt.task.run([
            'clean:server',
            'jade:server',
            'concurrent:server',
            'autoprefixer',
            'connect:livereload',
            'watch'
        ]);
    });

    grunt.registerTask('server', function (target) {
        grunt.log.warn('The `server` task has been deprecated. Use `grunt serve` to start a server.');
        grunt.task.run([target ? ('serve:' + target) : 'serve']);
    });

    grunt.registerTask('test', function (target) {
        if (target !== 'watch') {
            grunt.task.run([
                'clean:server',
                'concurrent:test',
                'autoprefixer'
            ]);
        }

        grunt.task.run([
            'connect:test',
            'mocha'
        ]);
    });

    grunt.registerTask('build', [
        'clean:dist',
        'jade:dist',
        'useminPrepare',
        'concurrent:dist',
        'autoprefixer',
        'concat',
        'cssmin',
        'uglify',
        'copy:dist',
        'modernizr',
        'rev',
        'usemin',
        'htmlmin'
    ]);

    grunt.registerTask('default', [
        'newer:jshint',
        'test',
        'build'
    ]);
};

bowerInstall exclude not works for me, you have any idea how make this works?