Fix crash on quit / pause not working.
Merge pull request #754 from unknownbrackets/quit-fix

Fix crash on quit / pause not working
Add more imm handling for shifts in x86 jit.

This is actually hit, and propagates more imms through.
Optimize addi/addiu to just LEA when possible.
Optimize out some addu/etc. calls against imms.
Optimize out slti in the x86 jit.

I'm kinda surprised this actually happens...
Implement ins and ext in the x86 jit.
Add a stub for clz/clo in x86 jit.
Merge pull request #755 from unknownbrackets/jit-minor

More x86 jit stuff
Merge remote-tracking branch 'upstream/master'
DLC