Merge pull request #533 from usineur/master

EMI: fix crash while trying to play music with PS2 versions
EMI: Make sure to set _musicTable to NULL for PS2 for now.
TinyGL: Remove the double zbuffer. Just use the 32bit one.
GRIM: Convert the zbuffer data to fit the 32bit zbuffer in TinyGL.
TinyGL: Try to not blit the clean buffer if empty.
README: Remove reference to unpacking patch with patchex.
updated urls for wiki and small cleanup
EMI: Split sound and actor functions out of lua_v2
EMI: Flesh out some of the sound opcodes.
Merge pull request #536 from klusark/emistuffnew

EMI: Split sound and actor functions out of lua_v2
EMI: Stub FreeSound and UnlockChore
EMI: Implement Run-Length Encoding for TGA images
EMI: Start on the implementation of sprites
EMI: Switch to using lua userdata for tag instead of storing it as a number
EMI: Implement some more actor opcodes
AUDIO: Add the AIFF decoder from ScummVM
EMI: Add basic support for sound effects
EMI: Implement opcode StopSound
EMI: Implement opcode PlaySound
EMI: Make sound a little more stable