English: First official source release! 2.12b

Fixes: - Fixed a display corruption/flickering bug with DirectX that would often occur when switching between windowed and full-screen. - Fixed a bug in regards to restoring windowed state (minimized/maximized/etc) when switching between windowed and full-screen; sometimes Gens would not switch out of full-screen properly.

- New build process for win32 version, using MS VS.NET (VC70) with performance optimizations. Resulting binary is larger, but runtime performance appears better. Probably runs more smoothly on slower machines.