View source for Rotamer Toggle

===EXAMPLES===
   colorRotamers chain A
   set_rotamer resi 40, -60,-40   (only set chi1,chi2 angles)
   set_phipsi resi 10-40, -60,-60 (create an alpha-helical-like section)
   createRotamerPDBs resi 10-12, ncutoff=3 (create 9 PDBs; each with one of the 3 most probable rotamers for resi 10,11,12)
   createRotamerPDBs resi 14, pcutoff=0.4  (create a pdb file for each rotamer of residue 14 with probablity > 0.4)