Make sure preallocated output is contiguous before using it

Take the compiledir lock only if the op generate c code.

Make check_preallocated_output work on fct outputs

Also set Python Exceptions before failing.

grad method for GpuContiguous

fix a NotScalarConstantError issue

Add test for when b is not constant

To be able to use negative offsets in indexing, threadIdx.x (and y)
should be cast to signed int.

Issue #1193: Fixed theano-nose --batch.

It may be slower than allocated new memory and calling memset,
but if that non-contiguous memory was provided, it is probable
that the output will end up being copied into that non-contiguous
memory, and that would be even slower.

WIP: fix compilation problem for GPU on windows.

Small fixes for Python 2.4

Revert "Fix error in EPD when using Python from C"

This reverts commit 962d3b2d.

Fix error in EPD when using Python from C

ignore old bug before Theano 0.5

In DebugMode, do not use the no_recycling list when calling the CLinker
to build individual thunks, so that output memory can always be re-used,
even for outputs of the actual function.

This enables check_preallocated_output to work on Ops that compute
the function's outputs.

This should close gh-1174.

fix syntax error in python 2.4