preinit script

[makeclean]

Need to write script that performs preinit calculation, which specifically serves to create the runtpe file from which subsequent runs are performed.

In the BT version, the preinit script was launched into the queuing system, which is bizarre since we were trying to avoid problems regarding nuclear data.

Either need:

• Need to put a local version in as part of the workflow
• Recreate BT method

The downsides are if it is done inline with the creation script then it can take a significantly long time, however we face the issue of copying nuclear data across the CHTC network which seems worse.

It seems ideal that the user must run the precondition script manually before the calculation commences.

[makeclean]

First version in as of a8db317, runs the preinit script for the input file specified.

The purpose of this preinit script is to ensure that for advanced tallies, the name of the output mesh is unique so no meshes are overwritten. For "normal" input decks we have no complex issues.