[unfiltered-oauth] Fix for whitespace bug in Authorization header parsing.

1 commit : Committing fix to Authorization header parsing ( handling an optional space after the comma separator that separates auth parameters ) in oauth.scala

Details here : http://oauth.net/core/1.0/#auth_header

The RFC 2617 spec for defining auth headers is here : http://tools.ietf.org/html/rfc2617