Add PyArray_Acorrelate function

PyArray_Correlate function did not compute the usual definition for
correlation: it assumed correlate(a, b) == correlate(b, a), and did not
use conjugate for the 2nd argument. As some people may rely on the
current behavior, we add a PyArray_Acorrelate function and acorrelate
python function to implement the usual definition.

Squashed commit of the following:

commit 1e1e0ff38968934825ad64cddd36fcb21e378954
Author: David Cournapeau <cournape@gmail.com>
Date:   Tue Jun 2 18:59:57 2009 +0900

    Refactor [A]Correlate, so that they share most of the implementation.

commit ffbd54ecf539df508363a725ec5f7529f71a9bb4
Author: David Cournapeau <cournape@gmail.com>
Date:   Tue Jun 2 18:35:21 2009 +0900

    Handle conjugate in correlate.

commit df47fddd8e5142758504dece39b0716b8f46434f
Author: David Cournapeau <cournape@gmail.com>
Date:   Tue Jun 2 17:42:38 2009 +0900

    Correlate and correlate tests better shared.

commit f48de4450b05260e9174cf224302a1c8a1f60331
Author: David Cournapeau <cournape@gmail.com>
Date:   Tue Jun 2 17:39:15 2009 +0900

    Add acorrelate function at the python level.

commit a37cc7ff144b0e6b64f8fd0a8cae4c9e561f4a1c
Author: David Cournapeau <cournape@gmail.com>
Date:   Tue Jun 2 17:21:20 2009 +0900

    Update test for correlate - we will test for inverted output for acorrelate.

commit 4140a30f1b6daf95ce2fa8fa7bd26f827b2fcfd1
Author: David Cournapeau <cournape@gmail.com>
Date:   Tue Jun 2 17:19:14 2009 +0900

    Add PyArray_Acorrelate function in the C API.

commit 082f9d4b0205a9a4f0112d8cfd3852b3907b6e09
Author: David Cournapeau <cournape@gmail.com>
Date:   Mon Jun 1 12:04:12 2009 +0900

    Add simple test for correlate.

commit 7179187953d7cb396a7557a418e6fbcaeddc4211
Author: David Cournapeau <cournape@gmail.com>
Date:   Mon Jun 1 11:57:46 2009 +0900

    Invert output array if we swapped input arrays.

0 files changed, 0 insertions, 0 deletions