idgames_file_map: close #35; added --morehelp block/handler
idgames_file_map: group related options together
idgames_file_map: started adding database processing
wadindex_schema.ini: Updated schema table with fields from .ini

- Swapped the 'games' and 'levels_to_files' table in the listing of
  schema objects for the database
wadindex_schema.ini: updated schema metadata and checksums