Add rask's UK78 and iErgoDox layouts (#1830)

Add rask's UK78 and iErgoDox layouts (#1830)

* Add rask's Satan layout

* Add rask's Satan layout

* Add rask's BananaSplit60 layout

* Add rask's BS60 readme

* Fix rask's BS60 readme image

* Fix rask's BS60 readme image again

* Add rask's UK78 layout

* Change RGui to be LGui to fix locale switching

On Ubuntu the keyboard seemingly lost RGui when toggling
between typing languages. With LGui toggling works normally.

* Add rask's ErgoDox Infinity layout

* Modify ErgoDox layout and add readme for it

* Add rask's UK78 layout readme