adding 3.0 lgpl licence dual

Author: andreassolberg

README.md

@@ -23,9 +23,12 @@ If you want to use JSO together with Phonegap to support OAuth 2.0 in a hybrid w
 
 ## Licence
 
-UNINETT holds the copyright of the JSO library. The software can be used free of charge for both non-commercial and commercial projects. The software is licenced with *The GNU Lesser General Public License, version 2.1 (LGPL-2.1)*.
+UNINETT holds the copyright of the JSO library. The software can be used free of charge for both non-commercial and commercial projects. 
 
-* <http://www.opensource.org/licenses/lgpl-2.1>
+The software is dual-licenced with *The GNU Lesser General Public License, version 2.1 (LGPL-2.1)* and *version 3.0*; meaning that you can select which of these two versions depending on your needs.
+
+* <http://opensource.org/licenses/lgpl-2.1>
+* <http://opensource.org/licenses/LGPL-3.0>
 
 
 ## Features