do not use livequery for performance reasons
use bootstrap theming for select2
use select2 for ordergroup user autocompletion
use select2 with ajax for autocompletion, remove jquery tokeninput
migrate remaining tokeninputs to select2
make jQuery hooks work on replaced elements
make somehow assets:precompile work again
Merge branch 'dropdown-select2' into uicleanup

Conflicts:
	app/views/finance/order_articles/_new.html.haml
Merge branch 'uicleanup' into foodcoop-adam-new