Adds netifaces module in the setup dependencies.

setup.py

@@ -39,6 +39,9 @@ dependencies = ["aiohttp==0.14.4",
                 "Jinja2==2.7.3",
                 "raven==5.2.0"]
 
+if not sys.platform.startswith("win"):
+    dependencies.append("netifaces==0.10.4")
+
 if sys.version_info == (3, 3):
     dependencies.append("asyncio==3.4.2")