Add license to README

README.md

@@ -1,6 +1,6 @@
 # Gradle Advanced Build Version Plugin
 
-A plugin to generate the Android version code and version name automatically.
+A plugin to generate the Android version code and version name automatically based on git commits number, date and [Semantic Versioning](https://semver.org/).
 
 [![GitHub Workflow Status](https://github.com/moallemi/gradle-advanced-build-version/workflows/CI/badge.svg)](https://github.com/moallemi/gradle-advanced-build-version/actions?query=workflow%3ACI)
 [![Maven Central](https://maven-badges.herokuapp.com/maven-central/me.moallemi.gradle/advanced-build-version/badge.svg)](https://search.maven.org/artifact/me.moallemi.gradle/advanced-build-version)
@@ -171,3 +171,24 @@ advancedVersioning {
 
 If your app name is MyApp with 4.6.1 version name the output apk file name will be: 
 `MyApp-google-play-4.6.1.apk`
+
+## License
+
+```
+Copyright 2020 Reza Moallemi.
+
+Licensed to the Apache Software Foundation (ASF) under one or more contributor
+license agreements. See the NOTICE file distributed with this work for
+additional information regarding copyright ownership. The ASF 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
+
+   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.
+```