Testing ok.ru for Technopark's QA course

Usage:

1. Run grid.sh
2. Run node.sh
3. Set BROWSER env variable with something of [FIREFOX, CHROME],
4. Set PASSWORD and LOGIN env variables with working ok's login-password pair
5. Run basic_grid to ensure everything works fine
6. Run run_tests.py

WARNING: geckodriver located in this repo is for Mac OS X only! Replace it locally if you need to set up a selenium environment for another system.