Update README to add Gradle instructions

README.md

@@ -38,6 +38,14 @@ Ensure that the JDK binaries are in your `PATH`.
 Ensure that your environment includes the `JAVA_HOME`.
 >set JAVA_HOME=C:\Program Files\java\jdk1.8.0_45
 
+#### Gradle
+Install the `Gradle build system` from [Gradle downloads](http://gradle.org/gradle-download/).
+Ensure Gradle is in your `PATH`.
+>set PATH=PATH;C:\gradle-2.6\bin
+
+Ensure that your environment includes the `GRADLE_HOME`.
+>set GRADLE_HOME=C:\gradle-2.6
+
 #### Java IDE
 You may want a Java IDE.
 - Install Jetbrains IntelliJ IDEA from [JetBrains downloads](https://www.jetbrains.com/idea/download/.)