first commit on refactoring MasterFile#update to get duration set on media object and presented in the catalog#index
cleanup and removing label which doesn't appear to be used anymore, doubtful this ever worked in the way it was used here
cleanup, making sure we check for empty and nil conditions on duration
fix logic for displaying duration
Merge pull request #17 from atomical/VOV-1005

first commit on refactoring MasterFile#update to get duration set on MediaObject