Also merge duplicate documentation of grad_sources_inputs.

PEP8 and docstring fixes.

Fix test in TrueDivTester

Since dtype mismatch is one reason the error is raised, it makes
interpreting it easier.

Fix Ger C code when output is a row or column.

Some BLAS versions did not accept (1,1) strides in that case.

Update tests, gpu_gemv is used now, not gemm/dot22

Fix test of elemwise_fusion, now intdiv is fused.

more helpful error to catch symbolic shape vecs in infer_shape

Add warning for bug in Numpy <= 1.6.1.

When using numpy's advanced indexing on huge arrays (2**32 elements or
more), Numpy <= 1.6.1 has a bug where the resulting array is not
properly filled. We emit a warning in those cases.

Use C code for Alloc of broadcasted scalar

Fix blas tests

C code for integer division

Minor stuff

Thanks Olivier :) Is great to have someone like you involved in the project, that is able to notice and fix all the small details.