PS2 port

A PS2 port may be a bit pointless but also really cool. Here is what would have to be done for the whole thing:

• reverse and use custom IOP modules. cdstream.irx, musicstr.irx, sampman.irx
• use sony IOP modules (padman &c.)
• probably use original 3.1 or 3.5 RW for PS2 (librw would need a lot of work)
• modify RW like R* did (RpGeometry allocation, skyFread, what else?)
• CDma, anim update in SPR
• CTimer
• CFileMgr and bits of CStreaming
• VU0 code for some math functions
• probably a bunch of debugging stuff for sanity?
• we currently assume not _WIN32 == POSIX, implement POSIX macros to differentiate it

Check https://github.com/GTAmodding/rwtest for some stuff

• uses RW 3.1
• cdstream implemented and working
• skyfs uses cdstream
• CFileMgr done (uses skyfs)
• simple pad handling. proper CPad should be trivial