Merge pull request #98 from atlasapi/mbst-4019-ingest-pa-channel-data

Support for XML on the channels/channelGroups endpoint
Merge broadcast alias URLs
copy aliasUrls when copying Identified
Merge pull request #87 from atlasapi/mbst-3961-index-episodes

Index Episodes
Merge pull request #88 from atlasapi/mbst-3962-search-episodes

Search Episodes
Rename isTopLevel to isTopLevelOnly
Add search filter to only return items with current broadcasts
Add priority channel boost
Merge pull request #99 from atlasapi/priority-channel-boost

Add priority channel boost
Update channel URIs for new channels
Rename priority channel boost to priority channel weighting
Merge branch 'master' into stage

Conflicts:
	src/main/java/org/atlasapi/search/model/SearchQuery.java