Start on some more thorough VPL tests.
Additional VPL tests, cleanup to smaller makefile.
Add test for sceKernelFreeVpl().
Add tests for vpl cancel, delete, refer.
Add a test for vpl alloc priority.

I guess 0x200 does nothing?  JPCSP says it's smallest but ignores too...
Merge pull request #47 from unknownbrackets/scheduling

VPL related tests