update Licence to LGPL3.0

Author: Honglei-Cong

LICENSE

@@ -1,3 +1,4 @@
+
                    GNU LESSER GENERAL PUBLIC LICENSE
                        Version 3, 29 June 2007
 
@@ -162,4 +163,4 @@ General Public License ever published by the Free Software Foundation.
 whether future versions of the GNU Lesser General Public License shall
 apply, that proxy's public statement of acceptance of any version is
 permanent authorization for you to choose that version for the
-Library.
+Library.