Keyboard: LED fixes for Kinesis Stapelberg controller, and keymap changes (#3564)

Keyboard: LED fixes for Kinesis Stapelberg controller, and keymap changes (#3564)

* Rules for vitamins_included

Added a section to disable RGB underglow for the Let's Split
   Vitamins Included board.

* fixing ortho_4x12 configs

* Using upstream/master version instead

* Additions and Corrections

Corrected the Kinesis/Stapelberg's .c file to allow LEDs to work
Removed excess cruft from my Kinesis keymap to reflect this change
Other minor tweaks and adjustments to my ortho_4x12 and 5x12 layouts

* Updated readme