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* Added CHANGELOG
* Added requirements.txt
* Updated documentation
* Updated README
* All HTTP methods moved to Session objects
* Added get_session method to service wrappers
* Added get_auth_session method to service wrappers
* Added get_raw_access token to OAuth1 and OAuth2Service
* OAuth2 client_id parameter interpolation moved to OAuth2Session
* Default OAuth parameter setting removed from all wrapper methods
* Default redirect_uri removed from all service wrapper helper methods
* Default response_type removed from OAuth2Service.get_authorize_url
* Default oauth_callback removed from OAuth1Service.get_raw_request_token
* parse_utf8_qsl moved out of all get_raw_* Service wrapper methods
* Default remote_user removed from OflyService.get_authorize_url
* Added Ofly MD5 signing option
* Moved Ofly signing logic into staticmethod on OflySession
* raise_for_status removed from all service wrapper helper methods
* Cleaned up OAuth2Service.get_access_token
* Default basic auth removed from OAuth2Service.get_access_token
* Service wrapper API unified
* hook module removed, replaced by session module
* Added unified Requests Session wrappers for each respective service
* Default connection timeouts moved into Session module logic
* All request injection now happens on Session objects
* Removed examples without correct, functioning credentials
* Test suite completely rewritten for more robust request checking