Merge pull request #62 from atlasapi/mbst-4794-ingest-pa-images

Persist images block
Abort equivalence set recomputation earlier when over-sized

Refactor `TransitiveLookupWriter` and its method for reading existing
transitive sets such that the process is aborted as the set of required
entries grows too large not once the entire set has been computed or
after it's been resolved (as before).

Other alterations attempt to avoid unnecessary copying of
collections/iterables and repeated work.
improve logging
Merge pull request #63 from atlasapi/mbst-4826-fix-large-equiv-sets

Abort equivalence set recomputation earlier when over-sized
Ensure over-size equivalence updates are aborted when no equivalents

The subject can be over-size by itself even when the set of equivalents
is empty. This change ensures that equivalence updates are aborted when
only an over-size subject is present.
Merge pull request #64 from atlasapi/fix-equiv

Ensure over-size equivalence updates are aborted when no equivalents
Persist the activelyPublished flag
Merge pull request #54 from atlasapi/mbst-3591-preview-networks-last-update

Mbst 3591 preview networks last updated time
Merge branch 'master' into mbst-4791-lovefilm-deletes
Merge branch 'mbst-4791-lovefilm-deletes' into stage

Conflicts:
	src/main/java/org/atlasapi/persistence/lookup/TransitiveLookupWriter.java