remove oauth 2d11 support
Before, OAuth2d11 requests would have been unpacked as OAuth2 requests. This
change enforces the need for OAuth2 requests to have a "Bearer" parameter.
remove ACCESS_TOKEN oauthparam
Merge pull request #9 from twitter/remove_oauth2d11

remove oauth 2d11 support
Merge branch 'master' into logging

Conflicts:
	src/main/scala/com/twitter/joauth/Unpacker.scala