Adds IS31FL3731 RGB Matrix Implementation (#2910)

* adds is31fl3731 rgb matrix implementation

* fix build script for force pushes

* allow bootloader size to be overwritten

* adds planck light implementation

* split led config into 2 arrays

* idk

* betterize register handling

* update planck implementation

* update planck

* refine rgb interface

* cleanup names, rgb matrix

* start documentation

* finish up docs

* add effects list

* clean-up merge

* add RGB_MATRIX_SKIP_FRAMES

* add support for at90usb1286 to bootloader options

quantum/rgb.h

@@ -0,0 +1,47 @@
+/* Copyright 2017 Jack Humbert
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef RGB_H
+#define RGB_H
+
+__attribute__((weak))
+void rgblight_toggle(void) {};
+
+__attribute__((weak))
+void rgblight_step(void) {};
+
+__attribute__((weak))
+void rgblight_step_reverse(void) {};
+
+__attribute__((weak))
+void rgblight_increase_hue(void) {};
+
+__attribute__((weak))
+void rgblight_decrease_hue(void) {};
+
+__attribute__((weak))
+void rgblight_increase_sat(void) {};
+
+__attribute__((weak))
+void rgblight_decrease_sat(void) {};
+
+__attribute__((weak))
+void rgblight_increase_val(void) {};
+
+__attribute__((weak))
+void rgblight_decrease_val(void) {};
+
+#endif