Added logic in Marvin:_schedule_metadata_update() allowing either calibre collection assignments + Marvin flags,
or calibre collection assignments + Marvin flags + Marvin collections.
Revised update_metadata logic to perserve existing collections when no custom columns assigned. Added silent switch for marvin_merge_collections, defaults to true. Default behavior is to append custom column assignments to existing Marvin assignments.
Possible Windows fix for issue #7 (waiting to hear from OP), fixed Windows-only late binding error.
Added iPad2 Verizon, fixed typo in README, working on PDF failure in GoodReader overlays
Split PDF metadata fetching between calibre for title/author, GoodReader for covers.
Polishing GoodReader caching