Explicitly set guava dependency to v15 rather than inherit from common
add BBC Nitro publisher
Merge pull request #158 from atlasapi/fix-description-copy

Copy short, medium and long description fields in Described.copyTo()
Merge pull request #151 from atlasapi/mbst-7010-nitro

MBST-7010 Add Nitro publisher
Add Unbox Publisher.
Check for null durations before extracting the seconds from them, when setting
durations on a version.
Merge branch 'mbst-7323-amazon-unbox-ingest' into stage

Conflicts:
	src/main/java/org/atlasapi/media/entity/Publisher.java