Change some BOOL variables to actual booleans. These are ones that can be set to it safely.
EnableTexUnit can also have its flag parameter converted over to bool from BOOL.
Explicitly show the values of the color combiner constants in CombinerDefs.h.
[Rice] Document some of RSP_S2DEX.h

Also a minor comment addition to CombinerDefs.h
Merge pull request #28 from lioncash/master

[Rice] Change some BOOL variables to actual booleans. These are ones that can be set to them safely.