Allow unary negation and flip sign in the polar() method
face lattice posit now uses facade, so there is no element attribute any more
upgrade setuptools to version 2.0
upgrade rpy2 to version 2.3.8
upgrade sympy to version 0.7.4
Merge branch 'master' into setuptools2

Conflicts:
	build/pkgs/setuptools/checksums.ini
upgrade to setuptools 2.0.1
Merge branch 'master' into sympy0.7.4

Conflicts:
	build/pkgs/sympy/checksums.ini
Merge branch 'master' into rpy2.3.8

Conflicts:
	build/pkgs/rpy2/checksums.ini
upgrade pycrypto to version 2.6.1
networkx: upgrade to version 1.8.1
sympy: don't restrict to python2 for cleanup
trac #15369: Alias groups.misc.AdditiveCyclic to IntegerModRing
trac #15435: WeylGroup and CoxeterGroup to groups.<tab>
Trac #15369: groups.misc.AdditiveCyclic

Following the discussion at ​https://groups.google.com/d/msg/sage-
devel/tyAxhqxk3ZI/SuBg2Ukwwj4J3

There is currently no way to create a group representing `Z/nZ` easily.
And the one acknowledged way to do that being `Integers(n)` (i.e.
`IntegerModRing(n)`), this patch exposes it as
`groups.misc.AdditiveCyclic`.

Nathann

URL: http://trac.sagemath.org/15369
Reported by: ncohen
Ticket author(s): Nathann Cohen
Reviewer(s): Volker Braun
Trac #15435: WeylGroup and CoxeterGroup to groups.<tab>

As the title says. Those groups were still missing. I also add a couple
of doctests to be sure that the feature remains.

Nathann

URL: http://trac.sagemath.org/15435
Reported by: ncohen
Ticket author(s): Nathann Cohen
Reviewer(s): Volker Braun
Trac #13312: Polyhedral bugfixes and improvements

The .polar() method of the Polyhedron class is incorrect, currently it
returns the inversion of the correct answer.  Thanks to sarah-marie
belcastro for pointing this out.

Another bugfix/improvement is adding support for negation, which inverts
polyhedra.  Implementing this revealed that scalar multiplication by
negative numbers gave incorrect answers for polyhedra with rays.

Finally this adds a convenience function for obtained faces in terms of
vertex and inequality indices.

URL: http://trac.sagemath.org/13312
Reported by: mhampton
Ticket author(s): Marshall Hampton, Volker Braun
Reviewer(s): Nathann Cohen
Trac #15510: upgrade setuptools to version 2.0.1

Source Tarball: [[https://pypi.python.org/packages/source/s/setuptools/s
etuptools-2.0.1.tar.gz|setuptools-2.0.1.tar.gz]]

URL: http://trac.sagemath.org/15510
Reported by: ohanar
Ticket author(s): R. Andrew Ohana
Reviewer(s): John Palmieri
Trac #15531: upgrade pycrypto to version 2.6.1

Source Tarball: [[http://ftp.dlitz.net/pub/dlitz/crypto/pycrypto/pycrypt
o-2.6.1.tar.gz|pycrypto-2.6.1.tar.gz]]

URL: http://trac.sagemath.org/15531
Reported by: ohanar
Ticket author(s): R. Andrew Ohana
Reviewer(s): Volker Braun
Trac #15532: upgrade networkx to version 1.8.1

Source Tarball: [[https://pypi.python.org/packages/source/n/networkx/net
workx-1.8.1.tar.gz|networkx-1.8.1.tar.gz]]

URL: http://trac.sagemath.org/15532
Reported by: ohanar
Ticket author(s): R. Andrew Ohana
Reviewer(s): Volker Braun