Merge pull request #4642 from RosettaCommons/vmullig/helical_bundle_predict_sequences
Add support to helical_bundle_predict for arbitrary heteropolymer building-blocks.
This is mainly an input issue. This PR lets you put in a sequence file containing a whitespace-separated list of residue type names in lieu of a FASTA file.
This pull request also updates the EnvPairPotential so that it properly handles D-amino acids.