(PSP) use the Grafic Engine for palette conversion.
add header guards
change iNESLoad argument type to match its declaration in fceu.c .
add header guards (cont.)
add a WANT_GRIFFIN makefile option to compile most source files as a
single unit
rebase with remote/master.
Merge pull request #22 from aliaspider/master

add a WANT_GRIFFIN makefile option and PSP hardware accelerated palette lookup