fix typo.
typo fix following code review.
Some update.
Fixed dtype in TensorVariable.
Merge pull request #2046 from nouiz/local_gpu_careduce

[opt warning] fix gpu reduce opt warning.
omlw continue.
Use bold.
small update.
add img
viewed_by and view_of reset
typo fixes
pep8
more pep8
Bugfix. We should only check the input that is viewed by a given output, not all inputs.
Another bugfix
small code refactoring.
Auto generate Op.{hash,eq,str}.
small refactoring to make code more clear.
Fix the crash.
bug fix. We where freeing too early, as the compute map values are list. If they contain any elements they evaluate to true. We want the list element to evaluate to true.