adjust casing of validation message
adjust file required validation msg
remove empty media 'working' record if not used
Implements (1) for #362. Non-required controller

validation for empty feed.
Silly Haris = does not equal ==
add strong parameters to concerto plugins #82
add strong params to submissions #82
Clean up template deletion, close #395.
Merge branch 'master' of github.com:concerto/concerto
private shouldn't be indented
Remote "Edit" Link for Groups
Merge branch 'master' of github.com:concerto/concerto
Fixed CSS to close #412
Moved character count init code into basic_interactions.js; removed partial with :js_ready content_for that did not work with turbolinks to close #410
Merge branch 'master' of github.com:concerto/concerto

* 'master' of github.com:concerto/concerto:
  Moved character count init code into basic_interactions.js; removed partial with :js_ready content_for that did not work with turbolinks to close #410
  Fixed CSS to close #412
  Remote "Edit" Link for Groups
  Clean up template deletion, close #395.
add srong params for templates #82
'Recent Activity' becomes 'Latest Activiy', closing #414
add strong params for subscriptions #82
Merge branch 'master' of github.com:concerto/concerto

* 'master' of github.com:concerto/concerto:
  'Recent Activity' becomes 'Latest Activiy', closing #414
add strong params for field, media, and position #82