Elemwise tester uint poc

Tracking Ops with grad methods returning None

Fix travis

Pep8

Reduce the number of allocation/reuse allocation of ndarray #1943

Remove consecutive functional inverses to optimize

In fast compile mode, non-inverse functions can be split into two
operations, which broke one of the asserts.
Also added exhaustive tests for all inverse function pairs.
Abstracted out the test assertions to enhance readability.

See:
https://github.com/Theano/Theano/issues/864

Tutorial for when a subset of the weight matrix should get updated

Accept symbolic `reps` in `tensor.tile`

fix gh-855.

Fix fun_files->func_files typo in error handler for COp unknown sections

c code of maxpool

small update to windows installation instruction

Stop confusing inner and outer outputs in connection_pattern()