Cleanup of lily_vm.c. No API changes this time, just comments and renaming.
Cleanup of lily_vm.c. No API changes this time, just comments and renaming.

FascinatedBox/lily,FascinatedBox/lily,FascinatedBox/lily,FascinatedBox/lily,jesserayadkins/lily,jesserayadkins/lily,jesserayadkins/lily