[SNES] SSNES v0.5.1

SSNES 0.51 05/06/2011

Fixes since RC1:

• When SDL fails to set GL vsync, attempt to use native calls to fix.
• rubyPixelSize et. al. removed. Texture coordinates are now consistent (top-left origin) across shader passes, so there is no need for it
• Improve performance when SNES resolution changes. Avoids memory allocation.
• Slight cleanup in shader compilation; it errors out during compilation and not in link phase.

Updates since 0.5:

• Fix crash in SDL driver when font is being rendered, and no font was selected.
• External audio driver can override sample rate.
• Add fast-forward "hold" mode as an addition to the current "toggle" mode.
• Use SDL joypad driver in GUI for Win32 to make button mapping more consistent for odd drivers.
• Fix color mapping for bSNES CPU filters from RGBA to ARGB.
• Fix some non-compliances with the ISO C99 standard.
• Fix case where some joypad buttons would "mysteriously" be bound to certain actions.
• Greatly update Cg shader implementation. Its implementation is now on equal ground with XML shaders.
• Add lookup-textures to XML shader and Cg shader implementations. Allows i.e. backgrounds.
• Add access for shaders to access the results of previous passes. This allows an "additive" processing model rather than "serial" only.
• Add possibility for shaders to peek into game state (RAM values) and act on these for dynamic effects.

GUI:

• Update GUI to latest Phoenix version.
• "Default" in input settings for GUI now also show the actual defaults.
• Shader and font settings now have their own sub-windows to conserve screen space.