Merge pull request #1601 from RosettaCommons/kylebarlow/coupled_moves
Allow coupled_moves to act on multiple ligands
* New option: coupled_moves::number_ligands
* Better behavior when the ligand_mode option is set to false; no longer also need to set the ligand_prob option to 0.0 to tell the code there is no ligand
coupled_moves integration test changes expected