[admin] New developer

Julian Squires should be added as developer for Linedit and Osicat, and since he doesn't have a common-lisp.net account yet one should be created. I've asked him to send in his GPG public key. Cheers, -- Nikodemus PS. I could add him myself, but in the absence of an administrative HOWTO I lack the courage to mess with our setup. Maybe we should have one. I can write the signing keys section...