Initial preparations for VFPU on NEON JIT
Add NEON immediate instructions
More NEON work. Make the ArmEmitterTest runnable on Windows (can't execute of course but can look at the output and step through it) and make it test the FPU regcache.
The basics of NEON VFPU are starting to work.

No speedup likely yet - there's just too many unimplemented instructions.