Comment #4 on issue 762 by anquetil...(a)gmail.com: VerveineJ keeps the
history of old entities, when invoked from the Moose interface
http://code.google.com/p/moose-technology/issues/detail?id=762
Could change the behaviour of VerveineJ:
- by default it would remove existing output.mse file
- if one wants to add entities to an existing mse file, one would have to
say so explicitly (command line argument)