Add token refresh failed notification; add authorizationTokenKey property to support id_token for authorization

git-svn-id: http://gtm-oauth2.googlecode.com/svn/trunk@103 22754eea-fc93-e339-b032-c1f495b90c16
Update project files, removing SBJSON sources

git-svn-id: http://gtm-oauth2.googlecode.com/svn/trunk@104 22754eea-fc93-e339-b032-c1f495b90c16