Adding elu and selu to docs

doc/library/tensor/nnet/nnet.txt

@@ -20,6 +20,8 @@
    - :func:`softmax`
    - :func:`softsign`
    - :func:`relu() <theano.tensor.nnet.relu>`
+   - :func:`elu() <theano.tensor.nnet.elu>`
+   - :func:`selu() <theano.tensor.nnet.selu>`
    - :func:`binary_crossentropy`
    - :func:`sigmoid_binary_crossentropy`
    - :func:`.categorical_crossentropy`
@@ -147,6 +149,10 @@
 
 .. autofunction:: theano.tensor.nnet.relu
 
+.. autofunction:: theano.tensor.nnet.elu
+
+.. autofunction:: theano.tensor.nnet.selu
+
 .. function:: binary_crossentropy(output,target)
 
    Computes the binary cross-entropy between a target and an output: