gemfile: group frontend gems
Gemfile: retire 'haml_coffee_assets'

R.I.P @netzpirat
Gemfile: re-add compass-rails (needed for IXT Sass framework)
sass: uberadmin: disable animation since sass/compass fails on the import

It was buggy anyway (animating borders is not performant and slows down browser)
add "Living Styleguide"

- convert old static styleguide to HAML
- build fully dynamic, "living" styleguide, make resourcefull-ish
- add basic spec test, trying out screenshots
- doc: add some research links, ideas
#tmp