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/tm2030/readme.md

@@ -9,7 +9,7 @@ Most of the TM2030 features are supported except
 * show desktop key (at the right of the space key)
 * 102/106 modes
 
-Dvorak mode is even supported by pressing [`Magic`](/TMK_README.md#magic-commands)+`1` (`Magic` is by default `LShift`+`RShift`)
+Dvorak mode is even supported by pressing [`Magic`](/TMK_readme.md#magic-commands)+`1` (`Magic` is by default `LShift`+`RShift`)
 
 Some keys had to be moved around to fit into the ErgoDox, especially the `F1`-`F12` keys and the arrow keys.
 
@@ -55,7 +55,7 @@ As on the original TM 2030, when `num` layer is activated, holding `fn` disables
 ## Dvorak Layer
 Same as Layer 0 but with _Dvorak_ layout, to use with QWERTY OS layout.
 
-Enable Dvorak layout with [`Magic`](/TMK_README.md#magic-commands)+`1` (`LShift`+`RShift`+`1`), disable with `Magic`-`0`.
+Enable Dvorak layout with [`Magic`](/TMK_readme.md#magic-commands)+`1` (`LShift`+`RShift`+`1`), disable with `Magic`-`0`.
 
 The middle (green) led indicates when the Dvorak layer is activated.