GitLab

Includes cleanup of the LibRetro EmuWindow implementation

Fixes #40

Fixes #39

- Audio core mechanics have been changed
- Framerate limiter now allows for custom target speed
- Other internal changes

This was previously stubbed in UI, but didn't reflect core state. This has been fixed.

Not needed for desktop platforms (from what I can see)

A virtual cursor is drawn on the lower screen to represent the emulated cursor. Left click using the mouse, or L3 to touch the screen.

Because the right analog is also shared with the C-Stick, a few options are provided:
 - Because so few games actually use it, you can continue with both C-Stick and touchscreen emulation.
 - You can disable the C-Stick entirely, or
 - You can disable the joypad's emulated pointer and use it exclusively for the C-Stick.
This is toggleable in the settings.

Acceleration is hardcoded at the moment, and L3 potentially conflicts with LR (though, again, very few games use them).