Dolphin SVN6257

r6257

• small HandleLoop() optimization for dsplle-int

r6256

• Some stuff which was still lying around on my hard disk:
• Add a sanity check in CRenderFrame::MSWWindowProc. Possibly reduces the risk of a crash when starting a game and immediately closing the emulation window when using the DX9 plugin.
• DX11: Add the resource usage as a parameter to CreateQuadVertexBuffer, possibly to be used in the future. 
• reduce the size of the EFB access buffers from 4x4 to 1x1 since they needn't be bigger anymore
• some fixes to the recent hires commit

r6255

• DX11: Add texture dumping and hires texture loading support. Not sure if hires textures are working perfectly, yet, so test this, please.