Currently, we not handle repairing version files well, so I
sought to seek a solution to the problem. This is one of part of the
puzzle, by implementing a simple "game repair". This is not
IndexedZiPatch support, but simply checking if we can restore version
files if possible, or otherwise wipe the directory.
* Move PlatformId to common module.
* Platform id is no longer hardcoded to win32.
* Parse apply options correctly.
* Parse target info better, use more native structures.
* All errors are now handled properly, and propagated up.
* Added a new Region enum.
* Added todo!() to all unhandled patching branches.
* Paths are now built using PathBuf instead of format!().
* process_patch function is no longer accessible, now you have to use
the function found in GameData and BootData.
