Set default pytest commandline options
No need for separate runner script
Fixed readme list formatting
Update dependencies: use python3
Update print syntax for python 3
Change 'error(string)' to 'raise Exception(string)'
added docstrings to __init__ files (pep8)
Fixed unnecessary built-in override in cro.get_net_info()
Removed unused code from tests and browser objects
Removed unused logging module
Clarified usage instructions