[Keyboard] Adds Gray Studio HB85 Initial Support (#5311)

* Gray Studio HB85 Initial Support

* Fixed README image

* Updated README

* Disabled Bootmagic and Console for HB85

* Fixed Numpad 4 matrix place

* Fixes board crashing with RGB enabled

* Moved HB85 files to gray_studio folder

* Uses old i2c library since this version makes RGB underglow work

* Improved default keymap with underglow control layer

* Removes obsolete program and uses generic script instead

As per zvecr feedback

* Uses GPIO Functions to initialise and set RGB underglow PINS

keyboards/gray_studio/hb85/i2c.h

@@ -0,0 +1,27 @@
+/*
+Copyright 2016 Luiz Ribeiro <luizribeiro@gmail.com>
+
+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/>.
+*/
+
+// Please do not modify this file 
+
+#ifndef __I2C_H__
+#define __I2C_H__
+
+void i2c_init(void);
+void i2c_set_bitrate(uint16_t bitrate_khz);
+uint8_t i2c_send(uint8_t address, uint8_t *data, uint16_t length);
+
+#endif