Bower: .gitignore all the extra stuff

.gitignore

bower_components/**/coffee
bower_components/**/grunt
bower_components/**/docs
bower_components/**/docs/js
bower_components/**/examples
bower_components/**/shared
bower_components/**/unit
bower_components/**/demo
bower_components/**/demos
bower_components/**/feature-detects
bower_components/**/media
bower_components/**/build
bower_components/**/sass
bower_components/**/css
bower_components/**/images
bower_components/**/release_notes
bower_components/**/spec
bower_components/**/test
bower_components/**/.*
bower_components/**/*.json
bower_components/**/*.css
bower_components/**/*.html
bower_components/**/*.coffee
bower_components/**/*.gemspec
bower_components/**/*.rb
bower_components/**/*.min.js
bower_components/**/*.md
bower_components/**/*.markdown
bower_components/**/*.txt
bower_components/**/*.sh
bower_components/**/*.map
bower_components/**/Gruntfile.js
bower_components/**/grunt.js
bower_components/**/Gemfile*
bower_components/**/Rakefile*
bower_components/**/*LICENSE*
bower_components/chosen/public
bower_components/jasmine/src
bower_components/jasmine/dist
bower_components/jquery/src
bower_components/jquery-validation/src