simplify .animation mixin (there ara no prefixed versions for -moz, -ms)
add spinner css animation
pure css spinner instead of background SVG
use custom select2 spinner (only gif)
delete svg spinner
Merge branch 'master' of github.com:cargomedia/CM into issue-1219
minor formatting
Merge pull request #1219 from christopheschwyzer/issue-1219

Replace SVG-spinner with CSS-spinner