+ "Real" predictable random. Seed depends on usercode map.
+ Created function for generating a reproducable seed out of user code but it fails inside the web-worker
+ Created function for generating a reproducable seed out of user code - as using JSON.stringify is not garanteed to be the same on every browser for objects.
+ Overly lengtly comment changed.
Moved random seed initialization to Existence System, where it can be configured.
Merged.