Added moving through events. Slight issue going backwards as you are
cycling through the list of events backwards you go > node off > node on
> node off > node on...

Means you turn the node off before you turn it on...
Merge branch 'master' of https://github.com/andyish/alpha.git

Conflicts:
	src/Main.java
	src/gnc/Visualisation/Diagram.java
	src/gnc/Visualisation/GraphController.java