Hello, I can't seem to find this particular question anywhere, so here goes.....Is it possible through a plug-in or another method, to allow users to friend request people that are not already members of the site?  For example, If I am a member of the site, but my real life friend Joe is not but I have his e-mail address, is it possible to send a friend request through e-mail that will make him sign up to the site and let us be linked as friends on the site?