Merge pull request #314 from atlasapi/mbst-6296-available-locations

Changes for improvements to available children resolution
Resolve and simplify People for CrewMembers

Creates a list of `CrewMemberAndPerson`s from the `CrewMember`s on a
piece of `Content` when simplifying by resolving the `CrewMember`s
identifiers to `Person`s.
Merge branch 'mbst-6614-content-people-images' into stage

* mbst-6614-content-people-images:
  Resolve and simplify People for CrewMembers

Conflicts:
	src/test/java/org/atlasapi/output/simple/ItemModelSimplifierTest.java