Updated tests:
Changed import method
started adding tests for inkbunny
Changed inkbunny_convert() to return none if given invalid input
Changed export_usernames_from_dict() to only export if handler is available
changed export_usernames_from_dict() to only create output file if handler is available
renamed inkbunny test class
Added function for sanitizing keys in the link dict to prevent conflicts from occuring when special characters are in urls
Added test for bug caused by non-alphanumeric chars in url