Add some new tests for clean! (some are failing)
Fix clean! handling of multiple classes
Added some test cases for different quotings of attributes
Use lookahead/lookbehind matches to simplify a bit
fixed broken codename deletion
fixed broken tinymce css relative root handling
handle thead correctly in closed content
Merge branch 'develop' into improve_clean
check for existence of mod directories
updated gems
migration to fix wrong type of account_request card
regenerated bootstrap data
fixed broken cucumber/capybara/selenium javascript handling
wiped old assets away
re-precompiled assets
ticked up version
Merge branch 'develop' into update_gemfile

Conflicts:
	Gemfile
	Gemfile.lock