Add support for 60FPS game hacks / cheats and other improvements

[leodexe]

There are a few handful of cheats in the form of Lag Fix, no frameskip, Unlock 60FPS and framerate fixes that this emulator could greatly benefit with. The problem is, it can't as there isn't any built-in support for cheats.

For example, in abitalive's modded Mario Kart 64, with 4 multiplayer Vs. splitscreen, the emulator can properly handle fixed 30FPS, so chances are highly likely it can also handle 60FPS hacks on games that normally are 30FPS, such as Mario Kart itself, Diddy Kong Racing, Banjo Kazooie, Banjo Tooie, Star Fox 64, Bomberman Hero, to name a few that have stable 60FPS hacks.

60FPS Cheats code source list 1 and other improvements http://forum.pj64-emu.com/showthread.php?t=5208

60FPS Cheats code source list 2 and other improvements http://forum.pj64-emu.com/showthread.php?t=6004

Mario Kart 64 60FPS and Enable Music in 3/4 Multiplayer Splitscreen: http://forum.pj64-emu.com/showpost.php?p=73074&postcount=4

This cheat for Mario Kart 64 isn't listed anywhere, it lets you disable (remove) or make invisible (hide) mini-bomb karts in multiplayer versus match races. Only in actual races, the ones on Battle Mode are left untouched. https://www.neogaf.com/threads/those-bomb-things-in-mario-kart-64-are-so-fucking-annoying.1415919/post-254385931

I tested them on Project64 and they work correctly, they also work on Mupen64Plus, since Wii64 is a fork of the latter, they should work too on the Wii.