Set MediaType and Specialization on Nitro episodes
Fix adding broadcast to version in Nitro schedule updater
Improve progress counting in ChannelDayProcessingTask
Improve extraction of Nitro Encodings/Locations
Don't extract Nitro Broadcasts on unknown channel
Merge branch 'mbst-7010-nitro' into stage

* mbst-7010-nitro:
  Don't extract Nitro Broadcasts on unknown channel
  Improve extraction of Nitro Encodings/Locations
  Improve progress counting in ChannelDayProcessingTask
  Fix adding broadcast to version in Nitro schedule updater
  Set MediaType and Specialization on Nitro episodes

Conflicts:
	src/main/java/org/atlasapi/remotesite/bbc/nitro/extract/NitroEpisodeExtractor.java