Include dist folder for use with Bower

The dist/ folder includes a build of the latest release. Combined with the
bower.json file, this enables the bourbon library to be installed via bower
for non-Rails web projects.
Merge pull request #277 from jasford/master

Include dist folder for use with Bower
Add !global to html5 input loops to remove deprecation notices with Sass 3.3rc
Merge pull request #289 from matiassingers/sass-pre-html5-fix

Add !global to html5 input loops to remove deprecation notices with Sass 3.3rc
New flexbox
Merge branch 'new_flexbox'