Can be specified from any .kll file

DebounceDivThreshold = 0xFFFFFFFF
Sets to max debounce, default is 0xFFFF.
The 0xFFFFFFFF is about a 2x longer debounce
The max requires more ram (as it uses 32 bit variables instead of 16).

Added support for submodule capabilities files.

- Removing old cli arguments

cmake -DREFRESH_KLL=1 ..

- Added layout files for 50 key and kishsaver
- Not yet working (some USB issues on AVR to debug)
- Fixed an OSX issue when building AVR
- Cleanup

- Automatically downloads the kll compiler if not found
- Added capability files to each of the module that currently have them
- Split modules.cmake so kll.cmake could influence build targets (also needs info from modules.cmake)
- Updated .gitignore for kll compiler directory
- Added documentation on how to manipulate layouts using CMakeLists.txt
- Cleanup of old layout files