Doc the new pool module

doc/library/tensor/signal/downsample.txt

@@ -11,9 +11,6 @@
 
 .. seealso:: :func:`theano.tensor.nnet.neighbours.images2neibs`
 
-.. autofunction:: theano.tensor.signal.downsample.max_pool_2d
-.. autofunction:: theano.tensor.signal.downsample.max_pool_2d_same_size
-
 .. function:: fft(*todo)
 
     [James has some code for this, but hasn't gotten it into the source tree yet.]

doc/library/tensor/signal/index.txt

@@ -21,3 +21,4 @@ forms of signal processing.
 
     conv
     downsample
+    pool

doc/library/tensor/signal/pool.txt

+.. _libdoc_tensor_signal_pool:
+
+======================================================
+:mod:`pool` -- Down-Sampling
+======================================================
+
+.. module:: pool
+   :platform: Unix, Windows
+   :synopsis: ops for performing various forms of downsampling
+.. moduleauthor:: LISA
+
+.. seealso:: :func:`theano.tensor.nnet.neighbours.images2neibs`
+
+.. autofunction:: theano.tensor.signal.pool.pool_2d
+.. autofunction:: theano.tensor.signal.pool.max_pool_2d_same_size