Merge pull request #2883 from RosettaCommons/vmullig/rotamer_read_refactor
Incremental merge of fix to rotamer scoring bug idenfied by Adam.
This merge should change nothing about current functionality, and does not itself fix the bug identified by @atom-moyer. Internally, it separates rotamer library reading into a parse step and a configure rotamer library step. This will make it easier for me to add correction steps in between.