Code review comment for lp://staging/~sil/desktopcouch/create-oauth-tokens-startup

Add oauth tokens as part of initial desktopcouch setup, and lock desktopcouch access to authenticated users only.

(NB: do not merge into desktopcouch trunk until http://issues.apache.org/jira/browse/COUCHDB-478 is in your couchdb build, or this will prevent access to your desktop Couch; it sets up an admin user in the ini file, but oauth authentication doesn't read from the ini file in Couch trunk; that's what the above patch is for.)