add a parser for digitool's digital_entries xml so we can fix an issue where 'METSID-NN' is used for hrefs in some METS files (all of FSU's, apparently).   Added initial support for repeated fileGrp elements. Added support for arbitrarily deep divs, and removed requirement for DMDID
Add a method to expose the file_dictionary from the parsed structmap
minor tweaks
tweak