Fix wrong @import
Delete files that we don't use/need
Switch from compass to libsass/grunt

This doesn't require ruby and grunt let's us do more stuff during the
build. All required JavaScript files (and uncompressed ones for easy
debugging) are now correctly copied from bower_components/.
Add foundation-icon-fonts as bower dependency
Use protocol-relative absolute URLs (fix #2)
Allow uploading of specific files
Explicitly use Python 2
Fix @imports

CSS @imports that appear in the generated app.css need to come first.