Include license (KSG Cabal 1.3.0 - 3.1). Refs #196.

Include missing license in Cabal file.

yampa/Yampa.cabal

@@ -1,3 +1,31 @@
+-- Copyright (c) 2003, Henrik Nilsson, Antony Courtney and Yale University.
+-- All rights reserved.
+--
+-- Redistribution and use in source and binary forms, with or without
+-- modification, are permitted provided that the following conditions are met:
+--
+-- - Redistributions of source code must retain the above copyright notice,
+-- this list of conditions and the following disclaimer.
+--
+-- - Redistributions in binary form must reproduce the above copyright notice,
+-- this list of conditions and the following disclaimer in the documentation
+-- and/or other materials provided with the distribution.
+--
+-- - Neither name of the copyright holders nor the names of its contributors
+-- may be used to endorse or promote products derived from this software
+-- without specific prior written permission.
+--
+-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND THE CONTRIBUTORS "AS
+-- IS" AND 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 COPYRIGHT HOLDERS OR THE
+-- CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+-- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+-- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+-- OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+-- WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+-- OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+-- ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 name: Yampa
 version: 0.13.3
 cabal-version: >= 1.10