Add snappy dependency for upcoming feature

install/install_apt.sh

@@ -83,6 +83,7 @@ python-pycaptcha
 python-pylibmc=1.2.2-1~trusty5
 python-amqplib
 python-bcrypt
+python-snappy
 python-snudown
 python-l2cs
 python-lxml

r2/setup.py

@@ -86,6 +86,7 @@ setup(
         "pylibmc==1.2.2",
         "webob",
         "webtest",
+        "python-snappy",
     ],
     # setup tests (allowing for "python setup.py test")
     tests_require=['mock', 'nose', 'coverage'],