Merge pull request #202 from luhcas/master

Größere Icons, verbesserte Abstände
reflect the recent CSS changes from #202
fix loading indicator
remove block_loader, use plain dependencies
fix #204
rename jquery_mockup to jquery_compat
move hack to jquery_compat
refactor chapter_list
use the new #postRender
fix JSON acceptance
wrap Backbone.sync with Q if applicable
fix sorting of chapters
remove old style sorting of content blocks
remove #deleteView
on #navigateTo to the same URL #reload instead
remove #deleteView
remove #deleteView
remove #deleteView, refs #123
move section title around, refs #201, refs #192
remove unused section finding