Issue #34: add docs/short-license-header.txt file for use with the Gr…

…adle License Plugin (when it's ready)

docs/short-license-header.txt

@@ -0,0 +1,16 @@
+Licensed to Apereo under one or more contributor license
+agreements. See the NOTICE file distributed with this work
+for additional information regarding copyright ownership.
+Apereo licenses this file to you under the Apache License,
+Version 2.0 (the "License"); you may not use this file
+except in compliance with the License.  You may obtain a
+copy of the License at the following location:
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.