* Remove chording as it is not documented, not used, and needs work.
* Make Leader Key an optional feature.
* Switch from `PREVENT_STUCK_MODIFIERS` to `STRICT_LAYER_RELEASE`
* Remove `#define PREVENT_STUCK_MODIFIERS` from keymaps.
* Added HHKB with 7U space bar
There are backlight changers on the function Z, X and C, mediat controls
have been removed.
* Fixed the default layout and added a keymap
GUI and ALT keys were swapped.
My own keymap which adds calculator, removes power, removes eject.
* Adjusted naming convention of hhkb layout layer
Fixed as per required from code review.
* Updated for qmk configurator
I didn't realise that there was a new standardisation across all the keymaps to accommodate the configurator.
Hopefully fixed now.
