v2.81 - Some development and some fixes

• A refactored 2D blitter architecture with a shader code generator for lower GPU-usage
  • Comes in handy with integrated GPU's
• A bugfix in the x86/64 VS CPU code generator
• Fixing the AMD D3D11 solid-color-texture bug on certain GPU architectures (Vega as of now)
  • D3D11 runs on an unoptimal but working path with those GPU's
  • You can suppress it by enabling option DirectXExt\SuppressAMDBlacklist to check out
    if a new driver release fixes it
• Experimental output color spaces are added for HDR/SDR WCG rendering
  • Option GeneralExt\ColorSpace to choose between SDR/HDR outputs
    (Precision of the internal DX rendering is adjusted to the colorspace by default)
  • Option DirectXExt\Default3DRenderFormat is modified to only control the internal
    rendering quality - you can override the default associated with the current colorspace
• DDraw/D3D fixes:
  • Implementing a flip-chain incompatibility with MS DDraw (Seven Kingdoms II HD)
  • Implementing a missing optimization for 8 bit surfaces (Colin McRae Rally)
  • Wrong rendering with forced resolution in certain cases
  • Fixing palette update on integrated GPU's in the D3D12 backend (Colin McRae Rally)
• D3D9 changes:
  • Generating more optimal vs/ps shaders for D3D9 along with some performance improvement,
    in certain cases
• Fixing broken clipping planes with D3D11 FL11.0 output (Tomb Raider Underworld)
• Fixing D3D12 leaks
• A lot of internal changes in the backends