Added Pause key mapping for debug builds. Updated Pause function so that while paused you can hit Spacebar to single-step frame-by-frame. You can exit pause mode by hitting pause again OR the Escape key.
Fixed 16-color planar mode hpel panning emulation. Hpel panning should not judder anymore, fixes Space Pigs "vicky" demo. Fixed "allow hpel effects" mode to obey Attribute Controller Mode register bit 5 that controls whether hpel is set to 0 on line compare. Fixed Disney sound source emulation, 64-bit builds can now use pure LPT DAC non-disney modes of the emulation. Fixed std::max() issue with VS2013.