Python-socketio

- Type in documentation [241](https://github.com/miguelgrinberg/python-socketio/issues/241) ([commit](https://github.com/miguelgrinberg/python-socketio/commit/3c08dda918dd1985c2f10174e7b54f031908099b)) (thanks **Emeka Icha**!)
- fix typo with quotes in doc [238](https://github.com/miguelgrinberg/python-socketio/issues/238) ([commit](https://github.com/miguelgrinberg/python-socketio/commit/a5a67120fec2211002915e8bbcff1c034a5eb93f)) (thanks **Julien Deniau**!)

- do not use six in setup.py ([commit](https://github.com/miguelgrinberg/python-socketio/commit/b4512b13176b6c04e29803759fff346ca78eb76f))

- unit test reorganization ([commit](https://github.com/miguelgrinberg/python-socketio/commit/b0a8b1f31bce4305c00ab0937ddfec1120a2d49d))
- user sessions ([commit](https://github.com/miguelgrinberg/python-socketio/commit/9f2186725adba33b634f7287e3518086e2bbc3ea))

- correct handling of disconnects [227](https://github.com/miguelgrinberg/python-socketio/issues/227) ([commit](https://github.com/miguelgrinberg/python-socketio/commit/45d880cf905f05e1c9966fbe46ed53236bda2851))

- SocketIO client
- reorganization of examples, plus some new ones for the client ([commit](https://github.com/miguelgrinberg/python-socketio/commit/4822d8125df11bbf2ef3061c0622164f37a261c9))
- minor example code fix ([commit](https://github.com/miguelgrinberg/python-socketio/commit/fc5fbcf005f750a67d6aeb7bbd190125ea7970fd))
- resolve wrong variable and css element [177](https://github.com/miguelgrinberg/python-socketio/issues/177) ([commit](https://github.com/miguelgrinberg/python-socketio/commit/251b5be9dfc5d88a3bbf146ff52197863d5ce109)) (thanks **iepngs**!)

- Fix variable referenced before assignment [85](https://github.com/miguelgrinberg/python-socketio/issues/85) ([commit](https://github.com/miguelgrinberg/python-socketio/commit/5b9b17c4a0654811aeda4184d159dafb5e0e4041))
- use Python 3.6 for docs build ([commit](https://github.com/miguelgrinberg/python-socketio/commit/142e4787375782c74d6d0b992115269dc290069b))