Merge pull request #1298 from RosettaCommons/dimaio/min_fixes
Two small updates/bugfixes for minimization:
1) adding a minimizer 'lbfgs' that uses the lbfgs minimizer with Brent line search. Updating rtmin to use this as it is more efficient in energy function optimization tests.
2) fixing a bug where polymer bonded energy container was not properly scoring symm poses when the scoring subunit was not the first.