Work around a regression in dealing with typedefs of arrays that appeared in Cython 0.17.3 or so.

I posted a message to the Cython mailing list about this at https://groups.google.com/forum/?fromgroups=#!topic/cython-users/fSZgHqrlCOc
Update README to refer to version 1.1.2

1.1.2 contains an important workaround for a change in Cython
Update for sage 6.0: remove the bitset_pxd.pxi import (see http://trac.sagemath.org/ticket/13352)
Update for sage 6.0: heed deprecation warning for using p.list() to get permutation in list form.  See http://trac.sagemath.org/ticket/14319.
Merge branch 'stable'

Conflicts:
	README.rst