Compiling should be easy and done automatically on any IDE that uses pom.xml files. In my case, I use Pulsar (Atom's continuation) with its ide-java package and it works well.

Just don't forget to compile for Java 8 for better compatibility with the launcher.

Packaging

This is pretty straightforward, just make a .jar file with the contents of the target/classes folder and add the contents of a Javassist .jar into the .jar previously made.

Using

Simple, just add -javaagent:path/to/the/built.jar before -jar when you start the launcher located in the ~/paladium-games folder. Also be sure to use Java 8 for better compatibility.