New version of the NES emulator for Windows.

Changelog:

- Fixed NMI_on timing edges.
- Fixed trainer support (again).
- Fixed WRAM behaviour when trainer data is present.
- Fixed a nasty PPU address masking at $2007 r/w.
- Added CPU dummy reads.
- Fixed a memory leak.
- Working mappers 21, 22, 23.
- Improved support for sound disable.
- Fixed broken WAV file recorder.
- Stereo WAVs were fixed.
- More timing fixes and minor changes.