Enable new mail editor window to send to contacts that only have public keys (no registered or at least known keyhoteeId, so keyhoteeId field is blank in contact) and to send to public keys for which we don't have any contact at all in our address book. The first case now works, but the second case (no contact in addressbook) crashes right now. Bug seems to have something to do with key being changed, so probably some problem in usage of key stringifying routines, but it's late and I'm tired. Should be simple bug to fix later.
Additional instructions for connecting clients directly on a local machine (added info on how to delete blockchains received during connection to remote server now that the connection to remote server works).