Siridb-connector

* Check for correct types using assert in query method.
* Changed timeouts for insert and query method.
* Changed callback functions

- Fixed handling authentication errors correctly. (issue 2)

- Added is_closed property to client.
- New and closed connections logging is set from info to debug. (issue 1)

- Fixed bug in setup.py
- Initial version for communication with SiriDB 2.0.x