Python-engineio-v3

- Accept leading and trailing slashes in engineio_path [83](https://github.com/miguelgrinberg/python-socketio/issues/83) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/924d3cb7a0416f7ccbc2364cc94dd07234f6f894))
- Use custom exceptions for internal errors [44](https://github.com/miguelgrinberg/python-engineio/issues/44) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/36814a48a58b6fdb996a0eed42e32e927711e182))
- Fix sanic url parsing [43](https://github.com/miguelgrinberg/python-engineio/issues/43) According to sanic docs, `request.url` already contains query string, so adding it results in data corruption. This fix worked for me. [#42](https://github.com/miguelgrinberg/python-engineio/issues/42) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/7dda70cb46a0e782d42c0a175ec61d0b95ebced8)) (thanks **Семён Марьясин**!)
- fixed aiohttp unit test ([commit](https://github.com/miguelgrinberg/python-engineio/commit/2b629096cd26378c6755e4db83286a0f573be477))

- Do not depends on SERVER_SOFTWARE constant from aiohttp [86](https://github.com/miguelgrinberg/python-socketio/issues/86) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/e1136aa4fda888f8f74135a94fadf8ac739cd6ad))
- proper handling of closed sockets ([commit](https://github.com/miguelgrinberg/python-engineio/commit/2144535e9dfe31a17ce6b9d40012d310b34a8c9a))
- use Python 3.6 for docs build ([commit](https://github.com/miguelgrinberg/python-engineio/commit/52b37e50a816635cc363b4655fa984f4519f64e5))

- Better handling of close packets from the client [41](https://github.com/miguelgrinberg/python-engineio/issues/41) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/db988f1c24db10db0a5969b0292834c4ac7b8882))
- rename `async` to `_async` to avoid conflicts [36](https://github.com/miguelgrinberg/python-engineio/issues/36) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/6fcf926ec7ec28a3f97f94ffcc6b665ffbbd6bcc))
- websocket support for sanic ([commit](https://github.com/miguelgrinberg/python-engineio/commit/317472459af6c04d26aa9255c0c8dc71ea81fa53))

- Use non-blocking reads for uwsgi websocket handles [417](https://github.com/miguelgrinberg/Flask-SocketIO/issues/417) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/4148c9470b8d73fc2b35feeeb2d5048cc52b9250))
- handle unexpected disconnects from uwsgi websocket ([commit](https://github.com/miguelgrinberg/python-engineio/commit/10ebccf6766a85da11fee4447a914ac338401d36))

- Use correct key name for ACCEPT_ENCODING header [39](https://github.com/miguelgrinberg/python-engineio/issues/39) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/f1df2e4a3595207c9f0e91b67a5131af19c0528f))

- updated examples readme ([commit](https://github.com/miguelgrinberg/python-engineio/commit/ea9ab79e25a9fbba561782a55aeeb5e76d68137f))
- Fix crash on invalid packet type. Add test [37](https://github.com/miguelgrinberg/python-engineio/issues/37) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/7eacdd98edfbf5ce7b1f0da0c3d2343cdf1cbffe)) (thanks **Dmitry Voronin**!)
- minor updates to sanic examples ([commit](https://github.com/miguelgrinberg/python-engineio/commit/c39a7751c72a90085d2bc88ab2487cb673724ee1))
- sanic examples ([commit](https://github.com/miguelgrinberg/python-engineio/commit/251485dcea260f38136bf27bb7676430f458c4f0))
- sanic support (long-polling only) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/b2da2283451d558298cae888b9ef148186830a7e))
- updated documentation logo ([commit](https://github.com/miguelgrinberg/python-engineio/commit/54e7115d35de20581e1328eded902c8d40788084))
- ensure iscoroutinefunction works well for mocks ([commit](https://github.com/miguelgrinberg/python-engineio/commit/917df6f57a32e278ee38ef3c6201c90fdab6d061))
- updated requirement files for examples ([commit](https://github.com/miguelgrinberg/python-engineio/commit/20db20f1764d25f50433e088d1d3486994b24139))