Documentation?

Is there any documentation or code examples on how to use this pretty nice looking API? I've walked through some of the code and the test source to try and figure it out, but still not sure how to use it. For example, how to I initiate a build? Tried the JobWithDetails.build() method but get an http not found exception and don't understand what's missing. That's just an example... I also followed the instructions for doing an anonymous clone of the repository so I could more easily walk through the code (as described [here](http://risingoak.github.io/jenkins-client/source-repository.html)) and that failed with permission denied. Bottom line... how do I learn how to use your API? Thanks