Note that the code was written with f being a variable or a list of variable
in mind (the documentation says so, and we even convert f into a list right
after the assert).

pep8 fix + added verbose exception

Small fixes

Add shape inference for sparse/basic.py Ops

A few PEP8 fixes, string formatting and cosmetic stuff.

more pep8 fixes

various other pep8 fixes so that being pep8 compliant doesn't take as
much time

Some more typo fixes & co

Cache

Fix reduce

dot() called on sparse matrices obeys 2D dimension matching rules,
even if they are single row/columns. dot() called on (1, N) and
(1, N) arguments, as was being done here, will fail. This transposes
the second argument to fix the problem.

Fixed issues with advanced inc/set subtensor in some cases

We implement it for tensor and sparse Contant Variable. This get also done for gpu variable as it inherit from the tensor Constant variable.