* Fix tilde in xd75 skewwhiffy
* Small tidy up
* Tidy up Colemak row
* Tidy up navigation layer
* Symbols layer redefined
* Fix UK Quote issue
* Use UK_QUOT rather than KC_QUOT
* Clarify the license for files we have signoff on
* Update against the currently signed off files
* Remove unused and not clearly licensed headers
* Replace an #endif I accidentally removed while resolving merge conflicts