Python-engineio

- be a bit more forgiving with socket timeouts ([commit](https://github.com/miguelgrinberg/python-engineio/commit/05da51a41d4a1a7a08e5f19194a248923780fff8))

- fixed typo ([commit](https://github.com/miguelgrinberg/python-engineio/commit/30445b239227daf88290a972349ba01cd31bd525))

- another fix in the lost connection detection logic ([commit](https://github.com/miguelgrinberg/python-engineio/commit/73ac2ea7791b79a01974a1ebdb97104f99c1d7a7))
- detect lost connections (asyncio) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/9a96896bbda37613bd8b29ac658427366e5d49be))
- detect lost connections (eventlet/gevent) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/e9a3161fdcb7767d77a2370d003f4e74ef3ecd1d))

- properly handle crashes in connect/disconnect handlers ([commit](https://github.com/miguelgrinberg/python-engineio/commit/5b24410016f334e739690438345782fb5dcece02))
- invoke disconnect handler when websocket handler crashes ([commit](https://github.com/miguelgrinberg/python-engineio/commit/f772cf62193e0dcc8be43814c1bfda7b987a2a15))
- invoke disconnect handler when application handler crashes ([commit](https://github.com/miguelgrinberg/python-engineio/commit/246edc3e84bce055284936745023ed4491897a5b))

- 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))