Node OnVisited event

[Timmoth]

Currently you have to keep a reference to a node and subscribe to its OnVisited event in order to call node.Exit() to move to the next node

For Example:

var T1 = nodeGraph.Create("T1");
T1.OnVisited += (s) =>
{
s.Exit();
};

This must be done for each node or else it will stay on that node forever.

I propose a default 'Instant transition' behaviour which moves to the next node as soo as the node is visited.

Also I propose that a subscriber can be set through the NodeGraph

nodeGraph.Visited("T1", OnT1Visited);
nodeGraph.Visited("T2", (sender)=>{ sender.Exit(); });

[Timmoth]

#20