Sweeping and reckless code modernisation of games folder handling, to migrate from NSString paths to NSURLs. Stripped out a bunch of Leopard code forks and other dead code. Updated a few missed license headers.
Corrected minor mistakes in previous commit from injudicious partial-file committing.
BXToolkit is dead, long live ADBToolkit. Relicensed all toolkit library code under uber-liberal BSD license. Gonzo modernisation and refactoring of library APIs.