With this option the simulation method is selected. This enables or 
disables internal consistency checks in SimTree and selects different
methods to evaluate results.

The following simulation methods are implemented:

* The batch means method allows for running several batches either
  sequential or in parallel on different nodes.

* The independent replication method generally uses a transient phase
  and following this a measurement phase from which the results are
  taken. The measurement phase is not divided into batches.

When this option is not given, the batch mean method is used.
