add license Apache 2.0

LICENSE

@@ -0,0 +1,11 @@
+Licensed 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
+
+   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.

README.asciidoc

@@ -25,3 +25,7 @@ then to deploy on OpenShift simply execute:
 To deploy your war as an exploded one add in the plugin configuration:
 
     <binary>${project.build.directory}/${project.build.finalName}</binary>
+
+== License
+
+Apache 2.0