Eran

### Summary If merged this pull request will add some more background to the documentation of the iteration example as well as show plots comparing results when iteration is used...

Inconsistent behavior between identical runs leading to simulation hanging

6

**Describe the bug** When running the fundamental integration example (see: https://github.com/GMLC-TDC/HELICS-Examples/pull/72) The simulation sometimes completes successfully and sometimes hangs without changing anything in the code or run command. This seems...