fix old outgoing user not removed on nick event
remove twitter identities on validation
Added guides validation for user event
add guides to user object on sign-up
nodemailer explicit version locking(0.7), added elasticsearch in package.json
add new nick to users array on "nick" event,  code cleanup
fixed issue #144
Merge pull request #143 from scrollback/bug-fixes

fix: old outgoing user not removed on nick event