Rovi data parsers and basic extractors
Rovi season history model and parser
Rovi episode sequence model and parser
Rovi theatrical release dates model and parser
Renamed Rovi ReleaseDates model and parser and moved under program package
Modified ProgramLineBaseExtractor and added Optionals to rovi model
Improved base and brand extractors
Added module, updater and processor for Rovi programs ingestion
Added a module for the rovi programs processor
Rovi schedule ingest

Initial commit of ingest of Rovi schedules. To be integrated with
the processing of programme files.
Processing and writing programs and series
Wired schedule processor in the main processor
Merge branch 'mbst-8219-rovi-data-processing' into stage