[EMU] RockNES 5.66

What's new for version 5.66 (04/09/2021)
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[fds driver]
- Disk inserted/ejected status is no more set to "true" on soft-RESET.
- Improved disk information, added CRC32.

[cpu]
- RAM is now completely filled with zeros.

[apu]
- Fixed a bug in the APU reset.
- Fixed a bug in the stereo sound downsampling calculation.
- Fixed NSF driver, major cleanups.

[graphics]
- Fixed windowed mode when out of focus.
- Fixed color calculations for various color styles.
- Color style "sepia #2" was changed to a new non-monochrome calculation.
- The loaded .NES filename is now displayed in the "File info" GUI option.
- Minor cosmetic changes in the GUI.

[general]
- Removed value $40 ORed at every joypad read.
- Keyboard is now polled before checking keys.
- Fixed emulator startup, several rewrites in the code, minor fixes.
- Fixed a memory leak problem.