Converted dump.xml to use snapshots (enabling MPI simulations)
Converted dump.xml to use snapshots (enabling MPI simulations)

limitation: rigid body data is only correctly exported in non-MPI runs

joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue