* Change include guards to pragma once
* Clean up default keymaps
* Remove some magic numbers and use GPIO macros
* Clean up keyboard.[ch]
* Tidy up info.json and readme
* Align config.h with template
* Split up revision code into subfolders
* rev C-H has no audio, apparently
* Change revc_h to revc and document differences
* Turn off Audio on revb for now, for Travis' sake
* Split info.json into revision folders
* Clean up default keymaps some more
