Update vision/state.

doc/introduction.txt

@@ -167,6 +167,7 @@ Theano Vision State
 
 Here is the state of that vision as of October 16th, 2017 (after Theano 0.10.0beta4):
 
+* `MILA will stop developing Theano. <https://groups.google.com/d/msg/theano-users/7Poq8BZutbY/rNCIfvAEAwAJ>`_
 * We support tensors using the `numpy.ndarray` object and we support many operations on them.
 * We support sparse types by using the `scipy.{csc,csr,bsr}_matrix` object and support some operations on them.
 * We have implementing/wrapping more advanced linear algebra operations. Still more possible.