Added unicode string support for python 2
Added type validation for Client and added tests.
Modified NotificationConfig function to accept parameters instead of a dict.
Added tests for that functionality.
Pythonifying comments and checking line lengths.
* Fixed PR comments (typos in comments of code)
* update_notification_config now allows setting either the notification url, threshold or both
* updated tests
Merge pull request #1 from SiftScience/update_python_partnership_library

Update python partnership library:
* Added unicode string support for python 2
* Added type validation for Client
* modified update_notification_config to accept parameters for threshold and url instead of only a dictionary