changed to using a renew token template since some connectors require a connectUrl with parameters (e.g. google latitude); also, added an oauth callback url that is specific to the renew token dance in order to customize the message shown to users as they return to the home page
WARNING: added yet another column to the Connector table ('renewTokensUrlTemplate') so you will have to run ConnectorInfo.sql again.
explicitely revoke the token before renewing it