PMLSD: Ingest clip images

These have a different form to content images, so weren't
being ingested previously because
Merge pull request #573 from atlasapi/pmlsd-clip-images

PMLSD: Ingest clip images
Merge pull request #575 from atlasapi/rovi-equivalate-en-publisher

Replacing deprecated Rovi publishers for equivalence
Beginnings of change
Taking into account categories for an equivalence task
Being consistent with the previous behavior for scheduling key generation
Merge branch 'equiv-specific-types' into stage
Tweaking Rovi equivalence job for equivalating top level items only
Merge branch 'rovi-equivalate-top-level-items' into stage