Add CTC module to Theano's documentation

doc/library/tensor/nnet/ctc.txt

+.. _libdoc_tensor_nnet_ctc:
+
+===============================================================================
+:mod:`ctc` -- Operation to compute CTC loss and its gradients
+===============================================================================
+
+.. module:: ctc
+   :platform: Unix
+   :synopsis: Connectionist temporal classification (CTC) loss Op, using the warp-ctc library
+.. moduleauthor:: `João Victor Risso <https://github.com/joaovictortr>`_
+
+.. autofunction:: theano.tensor.nnet.ctc.ctc
+.. autofunction:: theano.tensor.nnet.ctc.ConnectionistTemporalClassification
+
+.. automodule:: theano.tensor.nnet.ctc
+    :members:

doc/library/tensor/nnet/index.txt

@@ -21,3 +21,4 @@ and ops which are particular to neural networks and deep learning.
     neighbours
     bn
     blocksparse
+    ctc