initial commit.
Added path creator for Mailgun '/domains' path.
Moved tests from within the file to a test.py file.
Added new test case for DomainsURI class.
Added MailingListsURI class for '/lists' mailgun api.
Added required tests.
Removed all the bogus overenginered code with something much simpler to create URIs.
Merge branch 'master' of https://github.com/ipinak/Flask-iMail