RockNES 5.00 beta 4 released

New version of the NES emulator for Windows.

Changelog:

- Fixed joystick support and modified the config window.
- Fixed an obscure bug, "file doesn't exist" error.
- Fixed backed battery save/load, it was broken.
- Fixed PPU state loading, somewhat.
- Fixed sprite overflow flag, somewhat.
- Usual optmizations and tweaks.
- Added a new saveblock tagged as PTB1, extended PPU savestate.
- Added a new saveblock tagged as CPU1, extended CPU savestate, fixes loading errors.
- ROM patching dialog improved.
- Config file slightly changed for accuracy.
- The program can run in background now, sweet.
- Fixed video refresh rate to be 60Hz.
- Fixed sound output and changed from 44100Hz to 22050Hz as default.
- Other fixes I don't remember.