Basic Boostrap

bower.json

{
  "name": "bstest",
  "authors": [
    "Jon Parker"
  ],
  "description": "",
  "main": "",
  "license": "MIT",
  "homepage": "",
  "ignore": [
    "**/.*",
    "node_modules",
    "bower_components",
    "test",
    "tests"
  ],
  "dependencies": {
    "bootstrap-sass": "^3.3.6"
  }
}

gulpfile.js

'use strict';

var gulp = require('gulp');
var sass = require('gulp-sass');

gulp.task('sass', function () {
  return gulp.src('./styles.scss')
    .pipe(sass().on('error', sass.logError))
    .pipe(gulp.dest('./'));
});

gulp.task('default', ['sass'], function () {
  gulp.watch('./styles.scss', ['sass']);
});

package.json

{
  "name": "bstest",
  "version": "1.0.0",
  "description": "",
  "main": "gulpfile.js",
  "dependencies": {
    "gulp-sass": "^2.3.2",
    "gulp": "^3.9.1"
  },
  "devDependencies": {
    "gulp": "^3.9.1",
    "gulp-sass": "^2.3.2"
  },
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC"
}

styles.scss

@import "bower_components/bootstrap-sass/assets/stylesheets/bootstrap";