add translation, use object in back link for ruby 2.0 compatibility
Merge branch 'master' of github.com:concerto/concerto

# By August (3) and Brian Michalski (2)
# Via August
* 'master' of github.com:concerto/concerto:
  We really must stop support 1.8.x and using 5-year old deprecated syntax - there are 644 hashrockets in this codebase...
  Added new leader attribute to group model to allow leader to be added at group creation - closing #189
  Updated user view for groups to address #315, but left restrictive memberships permission in place for security reasons
  Load the ContentTypeRegistry sooner.
  Allow content#new to be rendered after an error.