Minor bug fix: Segment.rotate() provides numpy array of quaternions instead of list

mrdna/readers/segmentmodel_from_pdb.py

@@ -327,7 +327,7 @@ def SegmentModelFromPdb(*args,**kwargs):
                                             stacks,
                                             three_prime,
                                             seq,
-                                            orientations
+                                            np.array(orientations)
     )
 
 if __name__ == "__main__":

mrdna/segmentmodel.py

@@ -573,7 +573,7 @@ class Segment(ConnectableElement, Group):
             orientations = np.array([self.contour_to_orientation(v) for v in u])
             for i in ids:
                 orientations[i,:] = rotation_matrix.dot(orientations[i])
-            quats = [quaternion_from_matrix(o) for o in orientations]
+            quats = np.array([quaternion_from_matrix(o) for o in orientations])
             self.set_orientation_splines(u, quats)
 
     def _set_splines_from_ends(self, resolution=4):