- Abstracted USB Module
- Abstracted compiler specific includes for Scan, Macro, Debug, and USB modules
- Updated CMake build files to support changes
- Added abstractions necessary to main.c as well as a compiler specific include file

- Shouldn't affect anything, and will allow for greater buffer clearing control

- Keyboard output fully working
- Not all of the features are implemented yet (input, speaker, or power
  detection)
- There is no plan for mouse support

- Full support (NKRO, provided the USB module can handle it)
- Full LED support (available to the macro modules per input signals)
- Reset/Hold line support
- Handles repeat rate issues (keyboard does not send key updates as most
  keyboards do...)