Started on NEWS entry for 2.2.

Rev: nettle/NEWS:1.9

NEWS

+NEWS for the 2.2 release
+
+	* Relicensed as LGPL v2.1 or later.
+
+	* Support for Galois/Counter Mode (GCM).
+	
+	* Faster memxor.
+
+	* In command line tools, don't use -? for requesting help,
+          since it's a bit dangerous without shell quoting. Use long
+          option --help instead.
+
+	* Interface cleanup. 
+	
 NEWS for the 2.1 release
 
 	*Important*: this release breaks source and binary