pyOpenSSL 0.14 pulls in a bunch of new dependencies

[daira]

$ cat pyOpenSSL-0.14-py2.7.egg/EGG-INFO/requires.txt
cryptography>=0.2.1
six>=1.5.2

cryptography in turn depends on cffi and pycparser, resulting in the following warnings:

$ tahoe --version-and-path
allmydata-tahoe: 1.10.0 (/usr/local/lib/python2.7/dist-packages)
foolscap: 0.6.4 (/usr/local/lib/python2.7/dist-packages)
pycryptopp: 0.6.0.1206569328141510525648634803928199668821045408958 (/usr/local/lib/python2.7/dist-packages)
zfec: 1.4.24 (/usr/local/lib/python2.7/dist-packages)
Twisted: 13.2.0 (/usr/local/lib/python2.7/dist-packages)
Nevow: 0.10.0 (/usr/local/lib/python2.7/dist-packages)
zope.interface: unknown (/usr/local/lib/python2.7/dist-packages/zope)
python: 2.7.3 (/usr/bin/python)
platform: Linux-debian_7.4-x86_64-64bit_ELF (None)
pyOpenSSL: 0.14 (/usr/local/lib/python2.7/dist-packages)
simplejson: 3.3.3 (/usr/local/lib/python2.7/dist-packages)
pycrypto: 2.6.1 (/usr/local/lib/python2.7/dist-packages)
pyasn1: 0.1.7 (/usr/local/lib/python2.7/dist-packages)
mock: 1.0.1 (/usr/local/lib/python2.7)
setuptools: 2.2 (/usr/local/lib/python2.7/dist-packages/setuptools-2.2-py2.7.egg)
 
Warning: dependency 'cryptography' (version '0.2.2') found by pkg_resources not found by import.
Warning: dependency 'six' (version '1.5.2') found by pkg_resources not found by import.
Warning: dependency 'cffi' (version '0.8.1') found by pkg_resources not found by import.
Warning: dependency 'pycparser' (version '2.10') found by pkg_resources not found by import.
 
For debugging purposes, the PYTHONPATH was
  None
install_requires was
  ['setuptools >= 0.6c6', 'zfec >= 1.1.0', 'simplejson >= 1.4', 'zope.interface == 3.6.0, == 3.6.1, == 3.6.2, >= 3.6.5', 'Twisted >= 11.0.0', 'foolscap >= 0.6.3', 'pyOpenSSL', 'Nevow >= 0.6.0', 'pycrypto == 2.1.0, == 2.3, >= 2.4.1', 'pyasn1 >= 0.0.8a', 'mock >= 0.8.0', 'pycryptopp >= 0.6.0']
sys.path after importing pkg_resources was
  /usr/local/bin:
  /usr/local/lib/python2.7/dist-packages/pip-1.5.4-py2.7.egg:
  /usr/local/lib/python2.7/dist-packages/distribute-0.7.3-py2.7.egg:
  /usr/local/lib/python2.7/dist-packages/setuptools-2.2-py2.7.egg:
  /usr/lib/python2.7:
  /usr/lib/python2.7/plat-linux2:
  /usr/lib/python2.7/lib-tk:
  /usr/lib/python2.7/lib-old:
  /usr/lib/python2.7/lib-dynload:
  /usr/local/lib/python2.7/dist-packages:
  /usr/lib/python2.7/dist-packages

This is annoying, since it's going backwards with respect to our goal of reducing the number of crypto library dependencies.