Updated libgs:
*Changed the initialization function to be more like the Sony sceGsResetGraph() to make initializing and resetting this library simpler.
*Modified GsSetDefaultDisplayEnv() to function similarly to the Sony sceGsSetDefDispEnv(): NTSC, PAL and 480P will have the relevant values automatically filled in. DX and DY will be automatically adjusted, based on input from the EE kernel if supported.
*Moved the PSM specification for the draw and display environments to the respective set functions of both environment.
*FBW will be automatcally calculated within the respective set functions of both the draw and display environments.
*The functions have been categorized to reduce the amount of bloat that simpler programs will end up having.
*The uncached segment is now used instead of a call to SyncDCache(), since only a few bytes will be written as GS commands.
*The samples have been updated to compile with the updated libgs.

Also, the warnings in SBV have been silenced.