Support both AVR and ps2avrGB targets for new_project script (#2811)

* Stopping point at creating targets for new_project script

* Add second argument for target

* Add the ps2avrgb target

* consider the case where the firmware type target is not valid

* fix template files to be more generic

* Code cleanup

* Change variable name to be more descriptive

* make avr the default

* forgot to put the template files in

* Take out useless comments

* add usage info

quantum/template/ps2avrgb/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