Port the fix from astropy/astropy#2470

git-svn-id: http://svn6.assembla.com/svn/pyfits/trunk@2711 ed100bfc-0583-0410-97f2-c26b58777a21
Not sure but it appears Travis has fixed the goofiness with Numpy on Python 3 such that this symlink is no longer necessary...?

git-svn-id: http://svn6.assembla.com/svn/pyfits/trunk@2713 ed100bfc-0583-0410-97f2-c26b58777a21
Python 3.3 *should* be working now as well

git-svn-id: http://svn6.assembla.com/svn/pyfits/trunk@2714 ed100bfc-0583-0410-97f2-c26b58777a21