BK-941 Move Booktype specific files into separate directory
BK-936 Aloha plugin to increase/decrease indent
BK-942 Indent plugin uses undefined variable and crashes on Firefox
Merge remote-tracking branch 'sf_booktype/2.0' into 2.0

Conflicts:
	lib/booktype/apps/edit/static/edit/js/aloha/plugins/booktype/indent/lib/indent-plugin.js