Better doc

doc/library/sandbox/cuda/dnn.txt

@@ -63,6 +63,11 @@ To get an error if Theano can not use cuDNN, use this Theano flag:
     There is a problem we do not understand yet when cudnn paths are
     used with symbolic links. So avoid using that.
 
+.. note::
+
+    cudnn.so* must be readable and executable by everybody.
+    cudnn.h must be readable by everybody.
+
 
 Functions
 =========

theano/tensor/subtensor.py

@@ -1009,6 +1009,8 @@ def inc_subtensor(x, y, inplace=False, set_instead_of_inc=False,
 
     :param x: the symbolic result of a Subtensor operation.
     :param y: the amount by which to increment ths subtensor in question
+    :param inplace: Don't use. Theano will do it when possible.
+    :param set_instead_of_inc: If True, do a set_subtensor instead.
     :param tolerate_inplace_aliasing: allow x and y to be views of a single
         underlying array even while working inplace.  For correct results,
         x and y must not be overlapping views; if they overlap, the result