Merge pull request #1444 from embray/windows-path-issue

Fix to failing pkg_data test on Windows
Merge pull request #1398 from astrofrog/fix-python32

Astropy will no longer install on Python 3.2 with latest version of ``markupsafe`` package
Merge pull request #1458 from mhvk/units-sqrt

sqrt in units -> should return unit**0.5, not unit**-2
Merge pull request #1439 from eteq/wcs-randoms-to-context

Change wcs tests to use NumpyRNGContext
Conflicts:

	astropy/wcs/tests/test_wcs.py