Shadery PCSX2 i filtry gfx

GSdxFX

http://forums.pcsx2.net/Thread-Custom-Shaders-for-GSdx?pid=382468

The patch allows the loading of the FXAA shader externally. Exploiting this, you can replace that shader with another then turn it on/off with the same pgup key. Also, simply pausing and resuming is enough for checking changes and whatnots. Without modifying the patch, the shader must be named shader.fx and be placed alongside the main executable file. Would be nicer to load external techniques instead though, and multiple passes and all fancy thing. It's a start anyway.