Initial processing of series xml from theTvDb was too large to process in memory.  Had to uses the SAX which streams the data instead of loading the entire xml into memory.
Added constraint of nullable false for banner, fanart and poster in series.  If any are missing we get a validation error and do not save.  The must not be popular if all three images are not present and we do not want load series that are not popular to conserve space.  (Est. Data size 2.1 GB)
Added store images of banner, fanart and poster
Added firstAirDate to episode domain
Added episodeNameLowerCase to episode domain
Added seriesNameLowerCase to series domain