Fix elusive output-corruption bug in Scan.

The problem was that when copying a part of an array onto an overlapping
part of the same array, sometimes elements were overwritten before being
copied, leading to silent data corruption.

Import 'any' for python 2.4

Fixed crash when cuda is not available

This crash was introduced recently by ccb01355

Alloc

Also, don't print {} is there is no param to print. There is many scalar op like switch, LE, GT, ... that don't have a specified name.

Checks for preallocated output memory, take 2

Added theano.clone in the doc.

That way, we can more easily allocate an array full of zeros
of the right type.

Also use a saner way to compute the output dimensions.

All the checks will still be applied in the inner function at least once
on every input value. However, for subsequent calls of the outer
node on the same input values (for output memory checking), the inner
function call will be much faster.

That way, some instances of DebugMode can do the checks,
while others do not.

Since the contract regarding output memory has changed,
it is not guaranteed that the op itself did allocate that memory.

Also, create the memory buffers as needed.

Fixed crash in a specific concatenate situation

Mixed

Fixed bug with broadcastable flags of MaxAndArgmax