mathutils rotate functions for Euler/Quaternion/Matrix/Vector types.

each accept Euler/Quaternion/Matrix types.

eg:
  Euler.rotate(Quaternion(axis, angle))
  Vector.rotate(Euler((pi/2, 0, 0)))

matrix.resize_4x4() and euler.make_compatible() were still returning an instance of themselves, now return None.

doc/python_api/examples/mathutils.Vector.py

@@ -10,7 +10,7 @@ vec_b = mathutils.Vector((0, 1, 2))
 
 vec2d = mathutils.Vector((1, 2))
 vec3d = mathutils.Vector((1, 0, 0))
-vec4d = vec_a.copy().resize4D()
+vec4d = vec_a.to_4d()
 
 # other mathutuls types
 quat = mathutils.Quaternion()