Merge pull request #4198 from RosettaCommons/vmullig/fix_helical_bundle_predict_output
Add proper file output to non-MPI builds of helical_bundle_predict application.
I forgot to write a proper file outputter for the helical_bundle_predict application in non-MPI mode. This should correct that, allowing Rosetta silent, PDB, CIF, or MMTF output.
@cdbahl @everyday847