MIT-licensing change

Makefile

@@ -1,20 +1,28 @@
 #  Part of Grbl
 #
+#  The MIT License (MIT)
+#
+#  Grbl(tm) - Embedded CNC g-code interpreter and motion-controller
 #  Copyright (c) 2009-2011 Simen Svale Skogsrud
 #  Copyright (c) 2012 Sungeun K. Jeon
 #
-#  Grbl 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 3 of the License, or
-#  (at your option) any later version.
+#  Permission is hereby granted, free of charge, to any person obtaining a copy
+#  of this software and associated documentation files (the "Software"), to deal
+#  in the Software without restriction, including without limitation the rights
+#  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+#  copies of the Software, and to permit persons to whom the Software is
+#  furnished to do so, subject to the following conditions:
 #
-#  Grbl 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.
+#  The above copyright notice and this permission notice shall be included in
+#  all copies or substantial portions of the Software.
 #
-#  You should have received a copy of the GNU General Public License
-#  along with Grbl.  If not, see <http://www.gnu.org/licenses/>.
+#  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+#  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+#  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+#  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+#  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+#  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+#  THE SOFTWARE.
 
 
 # This is a prototype Makefile. Modify it according to your needs.