PLEASE TEST IN WINDOWS 7 AND WINDOWS XP BEFORE MERGING
Update windows solution files to VS 2017.
This also removes the MASM build commands from the zlib project. Having
this only makes buiding the source harder for new users, and it
ultimately isn't necessary.
The changes also rearrange the snesn9x project's <IncludePath> and
<LibraryPath> from (Include);(DirectX);(Cg) to (DirectX);(Cg);(Include).
These changes reflect the original library path order. The modification
I made beforehand could have affected XP builds and I didn't have a
chance to test this before merging.
drag&drop support for ROMs (no movies atm)
unified avi recording menu item
removed a few legacy leftovers
disabling the strech option no longer disables bilinear filtering
OpengGL support
full unicode support
x64 build support
shader support (D3D+OGL)
DDraw: vsync, dynamic buffer allocation
restored SPC save option
better window position saving
fixed crash during fullscreen switch
