Fix ops to accept any kind of preallocated output memory

some extra verbose prints in gpu conv code.

Cache

add the theano flags cmodule.warn_no_version to print warning when c_code_cache_version is not implemented.

Argsort numpy wrapping

That way, we also get rid of the contiguous requirement.

Also, use output memory even if not c-contiguous, instead of crashing.

The C code assumes that the output memory buffer is C-contiguous,
and it would be work to change, so we re-allocate a C-contiguous out.

Also make sure the output memory layout is suitable, otherwise it would
be copied a second time.

Gpu stuff

This affect all the function that call this inner function.

Check that Alloc nodes are not inserted during opt