Abstract batchnorm in pure Python and pure Theano.

9ad04124 · Gijs van Tulder · 3343d912 · 9ad04124 · 9ad04124
--- a/theano/tensor/nnet/bn.py
+++ b/theano/tensor/nnet/bn.py
--- a/theano/tensor/nnet/tests/test_bn.py
+++ b/theano/tensor/nnet/tests/test_bn.py