- replaced Model class in box demo with library's Model class
- switched GL context profile mask to compatibility in Windows builds
- only open audio device if audio is initialized
- increase default audio frequency and buffer size
- convert path objects to strings for compatibility with MinGW
- update MinGW builds to use regular filesystem library instead of experimental
- finish adding #pragma once to headers
- move configuration initialization into Game class
- print debug to stdout by default
- explicitly pass file to refresh to config auto refresh
- add delegate to sb namespace and deprecate get_delegate() in favor of delegate()
- set custom log function before loading config
- raise exception when no model textures are available