To compile this mod:
1: Use your favorite IDE like Eclipse or NetBeans.
2: Download the Forge MDK (Mod Development Kit)
3: Extract the source code into your working folder.
4: Open a command prompt in the folder and type 'gradlew setupDevWorkspace eclipse'
5: After decompiled source has been downloaded, copy this mod's SRC folder to replace the MDK SRC folder created.
6: Open a command prompt in the new folder and type 'gradlew.bat build'
7: A compiled jar file will be in your build folder.
Have Fun!
Resources
https://github.com/MinecraftForge/ForgeGradle