Added EFL license file, to actually comply with it

The license text must be distributed with any distribution of the "package".

http://www.eiffel-nice.org/license/

Author: Elad Alfassa

COPYING

@@ -0,0 +1,23 @@
+
+  Eiffel Forum License, version 2
+
+   1. Permission is hereby granted to use, copy, modify and/or
+      distribute this package, provided that:
+          * copyright notices are retained unchanged,
+          * any distribution of this package, whether modified or not,
+      includes this license text.
+   2. Permission is hereby also granted to distribute binary programs
+      which depend on this package. If the binary program depends on a
+      modified version of this package, you are encouraged to publicly
+      release the modified version of this package.
+
+***********************
+
+THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT WARRANTY. ANY EXPRESS OR
+IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE TO ANY PARTY FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES ARISING IN ANY WAY OUT OF THE USE OF THIS PACKAGE.
+
+***********************