Fix gevent monkey patching.

Fix applied to gevent, fastgevent & geventwebsocket backends.
Merge pull request #62 from Awingu/fix-gevent-patch

Fix gevent monkey patching
Added Python 3.4 and PyPy to the build.
Added Python 3.4 and PyPy to tox.ini.
Merge pull request #63 from thedrow/patch-1

Added Python 3.4 and PyPy to the build
Add tornado backend.
tornado.netutil.bind_unix_socket() removes existing socket.
fix flake8
Fix test_server
Fix travis and tox
Fix potensial attribute error.
Support Tornado's TCPServer and web.Application.
Fix bug.
Add example for tornado.