Better Statemachine and transition

[Soo Han]

http://wickedsource.org/2013/11/19/state-machine-with-java/

since you're using enums already; this article might help with state transitions

[Christian Schudt]

Thanks, I've read the article (although now it's no longer online), but it's not suitable here, because nearly every state can go into every other state. I am ok with the current way it works.