softgpu: Implement memory transfers.
softgpu: Fix normal-mode rectangle drawing.
softgpu: Disable clipping if it's not requested by the game. Also fix some clipping-related bugs.
softgpu: Some cleanups in SoftGpu.cpp
softgpu: Fix some stencil testing related bugs.
softgpu: Implement normal reversal.
softgpu: Process rasterization in screen space, rather than drawing space.
Adjust windows size based on renderWidth/renderHeight