Pyxel

- Fixed the version check of the resource file
- Fixed the typo of the PURPLE variables
- Added the uninitialized error
- Added support for command key shortcuts in Pyxel Editor
- Fixed undo and redo of Sound/Music Editor
- Changed color comparison method when importing images
- Updated the SDL to 2.0.10
- Updated the SDL_image to 2.0.5
- Changed dll search method for Python 3.8
- Updated the READMEs
- Added KEY_NONE constant to ignore key input
- Added pget API and renamed pix to pset
- Changed the palette colors
- Added new Pyxel palette file
- Changed the animated GIF making method

- Added the tri and trib APIs
- Modified the install option in the READMEs
- Added the quit_key option to the init API
- Added the target options to the load APIs
- Added the partial load function to Pyxel Editor
- Added Example 8
- Modified Example 5

- Added the Korean version of the README

- Fixed the Pyxel Packager

- Added the Chinese version of the README
- Added the icon option to the Pyxel Packager command
- Fixed the the copy method of the Tilemap class

- Updated the instruction for installation in the READMEs
- Removed dependency on NumPy
- Changed the search path of the asset folder in the Pyxel Packager
- Fixed the undo/redo for copy and paste in Pyxel Editor