allow premultiplication of SE(n) by numpy array, have to tell numpy to let us have the __rmul__

Author: petercorke

spatialmath/baseposematrix.py

@@ -109,6 +109,8 @@ class BasePoseMatrix(BasePoseList):
     _ansimatrix = False
     _ansiformatter = None
 
+    __array_ufunc__ = None  # allow pose matrices operators with NumPy values
+
     def __new__(cls, *args, **kwargs):
         """
         Create the subclass instance (superclass method)