Change method for generating Java from xml schema files, so that only one generated-sources folder
needs to be added to the build path. Unfortunately, it doesn't seem to add the generated-sources folder
to the build path automatically.
update pa channel schema files.
Add full images to channels.
 - refactor image simplification code out into separate image simplifier.
 - rework channel simplification to populate new images field on both channels and channel history
elements.
Merge branch 'mbst-5686-ingest-pa-channel-logos' into stage

Conflicts:
	src/main/java/org/atlasapi/output/simple/ContentModelSimplifier.java
	src/main/java/org/atlasapi/output/simple/DescribedModelSimplifier.java
	src/main/java/org/atlasapi/output/simple/PersonModelSimplifier.java
	src/main/java/org/atlasapi/remotesite/channel4/epg/C4EpgBrandlessEntryProcessor.java
	src/main/java/org/atlasapi/remotesite/channel4/epg/C4EpgEntryProcessor.java