Minor fixes for tarantool-python driver.

Tarantool-python 0.5.1

* Add sync field
* Add eval method (from tarantool)
* PEP8

Compatibility fix

Initial version for Tarantool 1.6 in the PIP and in the tags

Version 0.3.5

Dump version to 0.3.3

Added fix's for other tests, now tests result is OK

Updated to 0.3.1/ No more commits directly to master

Release 0.3.0

Release 0.2.2