Merge pull request #5392 from RosettaCommons/roccomoretti/fwdize_ResidueConformation
Convert ResidueType/Residue/Conformation/Pose usage in headers to fwd.hh
This is a mainly mechanical replacement of ResidueType.hh/Residue.hh/Conformation.hh/Pose.hh usage in header files to the corresponding fwd.hh headers. (And the downstream addition of the needed header files to the cc files.)