Update docs.

 * switch from Select2 v3.4.2 to 3.5.1 for the docs homepage
 * load html5shiv.js from maxcdn instead of cloudflare, update from v3.6.2 to 3.7.2
 * remove credits/link to contributors from footer
 * improve Sass organization
 * remove .select2-demos
 * links to demo pages are now handled via a Select2 dropdown
 * make direct use of Bootstraps' variables in gh-pages CSS
 * improve docs homepage UI
Remove box-shadow for .select2-container.form-control (inherited from Bootstrap's .form-control).
Fixed a.select2-choice background when dropdown opens above
Bower components now live in the default "bower_components" folder; ditch grunt-jekyll in favor of grunt-shell.
Build docs/demos on the latest stable Bootstrap 3 (v3.3.1, previously v3.2.0) and corresponding bootstrap-sass.
Merge branch 'bootstrap3' of https://github.com/Twaneus/select2-bootstrap-css into Twaneus-bootstrap3
Merge branch 'Twaneus-bootstrap3' into bootstrap3
Fix Twaenus' pull request; fixes https://github.com/t0m/select2-bootstrap-css/issues/35.
Remove border-left for .select2-arrow; fixes https://github.com/t0m/select2-bootstrap-css/issues/36.
Update grunt plugins, bower.
Update less.patch.
Bump readme.
Release v1.4.2.
Merge pull request #56 from fk/bootstrap3

bootstrap3 v3.4.2