Merge pull request #577 from RosettaCommons/roccomoretti/tilt_mover
Add an option to tilt (nutate) the docking partners in DockingInitialPerturbation, in addition to the spin possibility.
By default the tilt will happen perpendicular to the axis connecting the center of masses of the two binding partners. The center and the magnitude of the random tilt can be varied.
This is code that I'm committing on behalf of Joerg Schaarschmidt. (Though bugs have a good possibility to be from my code cleanup efforts.)