Support Multiple Authentication Methods

[kirbycope]

Add support for the following:
None
Basic - http://en.wikipedia.org/wiki/Basic_access_authentication#Client_side
Digest - http://en.wikipedia.org/wiki/Digest_access_authentication
oAuth1 - http://tools.ietf.org/html/rfc5849
oAuth2 - http://tools.ietf.org/html/draft-ietf-oauth-v2-31

It looks like BASIC and DIGEST authentication uses HttpHeaders. OAuth1 and OAuth2 use query string parameters.

Helpful article on OAuth
http://www.cubrid.org/blog/dev-platform/dancing-with-oauth-understanding-how-authorization-works/