To build this project, it's required to install git. Please install git commandline tool.
To build this project, what you have to run is ./gradlew build.
But it's not enough to use this ForgeGradle for some project.
This ForgeGradle is depending on a separated jar which built
from separated directory/project in this repository.
So you should publish to some maven repository.
You may publish to maven local repository by ./gradlew publishToMavenLocal.