SaveGame Manager GX r051

by dj_skual, Giantpune
Install/Extract saved game files. Based on Waninkoko's SaveGame Manager.

CHANGELOG r051
==============
-added NandBlockSize() fonction to get the blocksize of save in the wii nand
-added blocksize to savegame struct & devicebrowserinfo for later use (for now,
if the save is not installed on the nand, the returned blocksize is 0)

CHANGELOG r050
==============
-Updated to DevkitPro R21

News Source (1)