message: Bugfix: import `vector_diffeomixture` lib in
  tf.contrib.distributions.__init__.py
diff: @@ -50,6 +50,7 @@ from tensorflow.contrib.distributions.python.ops.relaxed_bernoulli import *
  from tensorflow.contrib.distributions.python.ops.relaxed_onehot_categorical import *
  from tensorflow.contrib.distributions.python.ops.sample_stats import *
  from tensorflow.contrib.distributions.python.ops.test_util import *
  +from tensorflow.contrib.distributions.python.ops.vector_diffeomixture import *
  from tensorflow.contrib.distributions.python.ops.vector_exponential_diag import *
  from tensorflow.contrib.distributions.python.ops.vector_laplace_diag import *
  from tensorflow.contrib.distributions.python.ops.wishart import *
  