wadindex_schema.ini: reworked 'file' table, order matches API docs
idgames_file_map: add database handling, add File objects to DB
INIFile: move checksum data inside loop so it gets reset every pass
wadindex_schema.ini: removed 'reviews', changed 'ratings' to NUMERIC
wadindex_schema.ini: missing comma truncated table definition
File: Renamed 'file_attributes' to just 'attributes'

- Removed url, idgamesurl, and ratings from 'attributes'
XMLParser: Access File attribs with 'attributes'

- Added a message when XML parsing was complete
- Commented out a dump of the XML elements
JSONParser: Access File attribs with 'attributes'
DBFile: finished adding/fixing add_file() method

- Lots of error checking after making database requests
- Lots of deleting/adding back of POD
idgames_file_map: added better checking for open files

- Added more debugging output