Removed extra include
Changes to field_from_file physics

Enable user to read a field in from a Peridigm run and access
the fields in the output.

The parameter "field_pseudonym" can be specified to read in a nodal
field from the Peridigm output and paste it into another field in
the Mingus simulation specified by the field_spec.

This is sort of a one-off approach since it assumes that the nodes
from the Peridigm output correspond to the elements in Mingus.
User-be-ware
Relaxed test for finding time in an exodus input for field_from_file physics