Pyxel

- Optimized the sound and music APIs
- Added the color class for the default palette
- Added the shortcut to select a color to the image editor
- Fixed the sound preview bug of the sound editor
- Enabled to quit from anywhere
- Added the flip API

- Fixed the index check of the playm API
- Enabled to access the screen as the image bank 4
- Changed the area to display the mouse cursor
- Optimized the image and tilemap APIs
- Updated the READMEs

- Fixed how to handle missing files in Pyxel Editor
- Fixed how to quit the application

- Fixed the way to decide the automatic screen size
- Fixed the API description in the READMEs
- Changed the way to handle runtime errors
- Changed save and load APIs to no return bool
- Specified the version of Python in the READMEs
- Added the play_pos API to Example 4
- Added the description of the included libraries to the READMEs
- Updated the screenshots of Example 3 and 4
- Fixed game controller input
- Improved the performance of the tilemap editor

- fixed the install_pyxel_examples script to include .pyxres file

- Modified .gitignore to ignore .vscode files
- Changed to use SDL2 instead of GLFW
- Removed the refimg argument from the Tilemap methods
- Changed the save and load method to return bool value
- Removed the run_with_profiler API
- Changed the max screen size to 256
- Added the play_pos API
- Changed arguments of the clip API
- Changed arguments of the rect and rectb APIs
- Modified the examples according to the API changes
- Renamed the resource file extension to .pyxres
- Added the drop_file property
- Added the caption API
- Changed the way to detect the caller script