Adapt changes from Bootstrap Kickstart v1.2.0

- Use `grunt-banner` to bring back CSS banners
- Concatenate and minify bower libs in production built.
- Fix git hook
- Grunt performance → Get rid of server directory and cachebusting
- Update dev dependencies.
- Use original Bootstrap JS modules in development …
- Change uglifiying tasks
- Prevent copying non minified CSS to dist directory
- Prevent copying of html files.
- Single quotes all over …
- Update Readme.
- Update Readme
- Added cd to the git install instructions
- Changed git-fork from ssh to https for non registered users
Add tests
Merge branch 'feature/changes-from-kickstart-v1.2.0' into develop

* feature/changes-from-kickstart-v1.2.0:
  Add tests
  Adapt changes from Bootstrap Kickstart v1.2.0