[Request] Standard patch support

[Squall]

Some games have fan patches to translate Japanese into English, fix some bugs or add mods.

Each patch has a different way to be applied to the game. The request is the implementation of a standard way in PPSSPP to patch the game when loading it without changing the original ISO.

Existing patches can be converted to the standard way. By comparing the original ISO and the patched ISO, we could generate standard patches. It would be good, because PPSSPP would patch the game easily, without using complex ways to patch the ISO.

Some existing patches and projects with source code:

Final Fantasy Tactics: The War of the Lions
A patch to fix slowdowns
http://ffhacktics.com/smf/index.php?topic=8490.0
I uses livepatch to apply the patch during the game without changing the ISO.
https://bitbucket.org/Archaemic/livepatch

Kingdom Hearts: Birth by Sleep -Final Mix-
English translation
http://www.pspgweber.com/forums/viewtopi...39&t=24102
It uses a patcher and a patch that have to be applied to change the ISO. However, it requires a real PSP.
There is source code.

Yu-Gi-Oh! 5D's Tag Force 6
English translation (incomplete)
http://gbatemp.net/threads/yu-gi-oh-5ds-...ct.351972/
http://wololo.net/talk/viewtopic.php?f=13&t=9552
The patcher is wqsg-umd
http://code.google.com/p/wqsg-umd/source/list

Other translations
http://forums.ppsspp.org/showthread.php?...9#pid49649

The translations are important, because many good games were released in Japanese without English version. Since Vita replaced PSP, American releases are unlikely.