Merge pull request #9 from atlasapi/content-query-equality

Add equals and hashCode method
remove references to missing selection field in ContentQuery
fix deserialization check for item type
Updated GsonAtlasClient to include new constructor in line with GsonTopicClient, deprecated old
Added TopicQuery
Modified AtlasTopicClient interface to change inputs/outputs to methods, and add new topics() method
Added AtlasChannelClient
Added GsonChannelClient
ScheduleQuery now takes channel aliases/ channelIds as Strings,
original methods are deprecated
First iteration of JaxbChannelClient
Update client after change of names on the ChannelGroupQueryResult
Merge branch 'mbst-4019-ingest-pa-channel-data' into stage

Conflicts:
	src/main/java/org/atlasapi/client/GsonChannelClient.java
	src/main/java/org/atlasapi/client/GsonQueryClient.java
	src/main/java/org/atlasapi/client/JaxbChannelClient.java