Merge pull request #39 from jrconlin/crypt1.9

feat: Update to cryptography 1.9

Author: martinthomson

python/setup.py

@@ -27,7 +27,7 @@
     ],
     keywords='crypto http',
     install_requires=[
-        'cryptography~=1.8.1',
+        'cryptography~=1.9',
     ],
     tests_require=[
         'nose',