Added Classpath Exception to the LICENSE to allow for any license being used in dependents.

Author: ogrammer

LICENSE

@@ -1,15 +1,28 @@
-    BytecoderGradle: A Gradle Plugin to compile Bytecoder programs.
-    Copyright (C) 2019  objectProgrammer
+BytecoderGradle: A Gradle plugin to compile Bytecoder programs.
+Copyright (C) 2020  objectProgrammer
 
-    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 3 of the License, or
-    (at your option) any later version.
+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 3 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.
+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 <https://www.gnu.org/licenses/gpl.txt>.
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/gpl.txt>.
+
+CLASSPATH EXCEPTION
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent modules,
+and to copy and distribute the resulting executable under terms of your
+choice, provided that you also meet, for each linked independent module,
+the terms and conditions of the license of that module.  An independent
+module is a module which is not derived from or based on this library.  If
+you modify this library, you may extend this exception to your version of
+the library, but you are not obligated to do so.  If you do not wish to do
+so, delete this exception statement from your version.

README.md

@@ -58,3 +58,9 @@ bytecoder {
 	escapeAnalysis = false
 }
 ```
+
+## License
+
+The plugin itself uses the GPLv3 license, however it also has the Classpath Exception (from the JDK) which allows you to use the library and even embed it in a project with any license. Any changes made to the plugin itself must be open-source.
+
+Note: this is just a summary and shouldn't be used for legal purposes, read the [LICENSE](LICENSE) file for more information.