python-packages updates scipy and scikitlearn

[FRidh]

Built and installed locally. Tested with Python 3.4.

[FRidh]

The build failed due to running out of memory

Which isn't untypical for scipy

Also tested with Python 2.7, as well as pypy which cannot build since numpy cannot build, as expected.

[bjornfor]

It seems python*Packages.scikitlearn fail with scipy 0.16.0. They fail during test phase.

[bjornfor]

cc @offlinehacker, who added scikit-learn to nixpkgs.

[FRidh]

There are indeed some tests in scikit-learn 0.16.0 that fail with scipy 0.16.
scikit-learn/scikit-learn#5045

scikit-learn 0.16.1 is the latest release, but that version has the same issues.

[FRidh]

In c3b7549 I disabled scikit-learn tests.

Some tests in scikit-learn 0.16.1 fail with the new scipy 0.16 package.
This is known upstream and should be fixed in the next release.
scikit-learn/scikit-learn#5045

This commit disables the tests until the next scikit-learn release.

[FRidh]

This PR now updates both scipy and scikit-learn. The scipy update caused some scikit-learn tests to fail. The current beta of scikit-learn upcoming new version fixes these issues. Therefore, scikit-learn is now updated also to that beta.

I've built locally with nox review wip.

[FRidh]

Travis failed due to running out of memory.

[FRidh]

Merged in #10255