Cave Story DS v0.4

v0.4:
This version adds the option of the SD card ROM, which supports basic mods.
See the SD card folder readme for instructions on how to use it.
There are also many fixes and quality of life improvements.

- Added a setting to use an alternate set of percussion for songs.
- You can now fast forward during cutscenes and events by holding down the R button.
- Added a few songs to the sound test.
- 50fps mode is now smoother. (Switched to a timer system instead of adding an additional wait)
- Disabled file opening after ejecting card, so saves and config menu won't just crash.
- You can toggle the console output with L+R+Select.
- Holding down the Start button during boot will set display on the bottom screen.
- Reduced size of ROM by compressing songs.
- Added a loading progress indicator.
- Improved look of credit illustrations.
- Updated credits in the readme.
- Add version to game subtitle and config menu.
- Fixed missing tiles in Egg Corridor?.
- Fixed arms graphic being corrupted after credits.
- Fixed credits graphics corruption after viewing it twice.
- Fixed face portrait appearing for a bit before sliding.
- Reduced flicker and save a few frames when uploading texture (use DMA).
- Fixed flicker during fast forward.
- Upload face portrait and Japanese text to texture only during vblank, reducing flicker.
- Fix ending cloud parallax.
- Added an additional "fun" rom.
- Multi: Fixed NPCs targeting dead players.
- Multi: Optimized performance a bit.
- Multi: reduced flicker.
- JPN: Add some missing characters to the font. (whoops)
- JPN: Fixed credit text being cut off.
- JPN: Fixed some missing credit portraits.