Add presence and inclusion validations; Set workflow on dropbox files
Merge branch 'develop' into bugfix/VOV-2216
making models work with workflow name validation
Allow set_workflow to detect audio or video and choose appropriate workflow
Remove offset for audio file
Merge pull request #189 from avalonmediasystem/bugfix/VOV-2216

Files attached from dropbox do not get to Matterhorn (VOV-2216)