Dammit pyelliptic is gone

cryptography, pyOPENSSL and others don't do ECDH on P-256, so we're going
to have to pin to 1.5.7 for the near future, which means old openssl.

openssl ABI compatibility would be really nice.

Author: martinthomson

python/setup.py

@@ -10,7 +10,7 @@
 
 setup(
     name='http_ece',
-    version='0.7.2',
+    version='0.7.3',
     author='Martin Thomson',
     author_email='[email protected]',
     scripts=[],
@@ -27,7 +27,7 @@
     ],
     keywords='crypto http',
     install_requires=[
-        'pyelliptic',
+        'pyelliptic==1.5.7',
         'cryptography',
     ],
     tests_require=[