Merge pull request #1445 from RosettaCommons/jkleman/mp_updates_toolkit
Jkleman/mp updates toolkit
= made HelixFromSequence app into a Mover
= added PDB numbering support for spanfile input, new spanfile format will automatically be detected
= added PDB numbering support for MPMutateRelaxMover
= added integration tests for PDB file format in spanfile and MPMutateRelaxMover