remove HU specific translations
hotfix: group requests couldn't be confirmed/declined
Add title tags to img
Merge branch 'dev_removeHUSpecificStuff'
Merge branch 'dev_addAltAndTitleTagsToImg'

Conflicts:
	src/Ethergroups/MainBundle/Resources/translations/messages.de.yml
	src/Ethergroups/MainBundle/Resources/translations/messages.en.yml