Squashed 'extern/frontend/' content from commit 147965a

git-subtree-dir: extern/frontend
git-subtree-split: 147965aa170984e301246946011eaffa25ba230b
Merge commit '97c602efe13f78e6f95e773d17214655eea9a7c1' as 'extern/frontend'
added subtree and common front-end stuff
added initial common frontend styles, imported bootstrap in moduler sass form
calling common styles, added combine-media-queries and cssmin to gruntfile, fixed grunt autoprefixer
Merge branch 'master' of github.com:yoshokatana/teams