DennyTom's buttery_engine (#8138)

* Selectively adding pieces

* Adding georgi keymap

* Adding more files, fixing make

* Smaller makefiles

* Fixing make rules

* README more inline with QMK's guidelines

* Turning off buggy assert

* Improving documentation based on a user feedback.

* Slightly better schema

* Resurrected state machine diagram

keyboards/butterstick/keymaps/dennytom/rules.mk

@@ -0,0 +1,8 @@
+MOUSEKEY_ENABLE = yes
+EXTRAKEY_ENABLE = yes
+CONSOLE_ENABLE = no
+# COMMAND_ENABLE = no
+NKRO_ENABLE = yes
+
+TMPVAR := $(SRC)
+SRC = $(filter-out sten.c, $(TMPVAR))