setTimeout 0 needed in graph simulator

[michielbdejong]

I would think each message processed leads to adding a number of messages to the queue and then returns synchronously, but for some reason, if you don't use a setTimeout between propagate iterations in test/helpers/graph.js, it reaches maximum callstack size. A console.log statement in each iteration also does the job, which means that console.log is not a usable method to investigate this problem. :)