custom_map example does not work

[FilipeMaia]

When I try the example condor/examples/scripts/custom_map/example.py I get:

$ python example.py
Simulating map
WARNING:    File ./condor.cxi exists and is being overwritten
Traceback (most recent call last):
  File "example.py", line 39, in <module>
    res = E.propagate()
  File "/Library/Python/2.7/site-packages/condor/utils/log.py", line 60, in st_func
    r = func(*args, **keyArgs)
  File "/Library/Python/2.7/site-packages/condor/experiment.py", line 168, in propagate
    D_particles = self._get_next_particles()
  File "/Library/Python/2.7/site-packages/condor/experiment.py", line 152, in _get_next_particles
    D_particles["particle_%02i" % i] = p.get_next()
  File "/Library/Python/2.7/site-packages/condor/particle/particle_map.py", line 204, in get_next
    O = AbstractContinuousParticle.get_next(self)
  File "/Library/Python/2.7/site-packages/condor/particle/particle_abstract.py", line 266, in get_next
    O = AbstractParticle.get_next(self)
  File "/Library/Python/2.7/site-packages/condor/particle/particle_abstract.py", line 97, in get_next
    O["extrinsic_quaternion"] = self._get_next_extrinsic_rotation().get_as_quaternion()
  File "/Library/Python/2.7/site-packages/condor/particle/particle_abstract.py", line 152, in _get_next_extrinsic_rotation
    rotation = self._rotations.get_next_rotation()
  File "/Library/Python/2.7/site-packages/condor/utils/rotation.py", line 340, in get_next_rotation
    self._rotations[0]._set_as_random_formalism(self._formalism)
  File "/Library/Python/2.7/site-packages/condor/utils/rotation.py", line 146, in _set_as_random_formalism
    self.set_as_random()
  File "/Library/Python/2.7/site-packages/condor/utils/rotation.py", line 158, in set_as_random
    q = rand_quat()

Looks like rand_quat() is not defined anywhere.