fixes #830 in the chrome store and online, the chrome store is unfortunately waiting for issue #827 and #828 which have to do with the fact we cant whitelist iriscouch anymore for CORS using a permission. we are waiting for some guidance from the chrome extensions developers list... this issue also fixes #829 and fixes #801 with a new update page that backups the user's corpora in their pouches so they can use it in the online app. it also fixes #769 we have changed the public user so that hte one in the authentication and the one in the userPrivate are the same, thereby ensuring that the userpublic can be saved into a user's corpus, and the userpublic stored in the users preferences is used to overwrite old ones in teh corpus