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/ergodox_ez.c

@@ -4,16 +4,6 @@
 bool i2c_initialized = 0;
 uint8_t mcp23018_status = 0x20;
 
-__attribute__ ((weak))
-void matrix_init_user(void) {
-
-}
-
-__attribute__ ((weak))
-void matrix_scan_user(void) {
-
-}
-
 void matrix_init_kb(void) {
    // keyboard LEDs (see "PWM on ports OC1(A|B|C)" in "teensy-2-0.md")
     TCCR1A = 0b10101001;  // set and configure fast PWM
@@ -37,11 +27,6 @@ void matrix_init_kb(void) {
     matrix_init_user();
 }
 
-void matrix_scan_kb(void) {
-    matrix_scan_user();
-}
-
-
 void ergodox_blink_all_leds(void)
 {
     ergodox_led_all_off();