Backlight abstraction and other changes (#439)

* redoes matrix pins, abstracts backlight code for B5,6,7

* slimming down keyboard stuff, backlight breathing implemented

* don't call backlight init when no pin

* cleans up user/kb/quantum calls, keyboard files

* fix pvc atomic

* replaces CHANNEL with correct var in breathing

* removes .hexs, updates readmes, updates template

* cleans-up clueboards, readmes to lowercase

* updates readme

keyboards/ergodox_ez/keymaps/jacobono/readme.md

@@ -0,0 +1,34 @@
+# Default Layer #
+
+I'm using the colemak layer -- customized a bit to work a bit better when using spacemacs as my editor.
+
+![default-layer](img/colemak-default-layer.png)
+
+## Special Keys ##
+
+`SC1` => `LGUI + TAB`
+
+`SC2` => `LGUI + SPACE + TAB`
+
+`L1` => Switch to QWERTY Layout
+
+`T(L2)` => Toggle Symbol Layer
+
+`T(L3)` =>  Toggle Number and D-Pad Layer
+
+# QWERTY #
+
+Nothing special here -- just need this layer tucked away for the `WASD`.  Which is literally the only reason I use it.
+Just have the same button to toggle back to colemak.
+
+# Symbol Layer #
+
+![symbol-layer](img/symbol-layer.png)
+
+This is just putting matching closing symbols next to each other -- useful when editing lisp.
+
+# Number and D-Pad Layer #
+
+Just a basic number layer with a D-PAD on the other side.
+
+![number-dpad-layer](img/number-dpad-layer.png)