Label Fix: Login to Log In, Sign out to Sign Out, Register to Join

Information Architects try to use labels that people would say out loud. When I hear people ask me computer questions, they might say "Tyler! I JOINED Facebook!" or "Tyler? How do I sign up for Facebook?" I think what you guys have is great, I'm just polishing it a little bit. Really you could choose either Sign Up or Join, but I thought Join had better connotations. If we can make the user pause to think a split second less before they clicked on the link, mission accomplish. Das good design.
Merge pull request #788 from Squ34k3rZ/patch-8

Label Fix: Login to Log In, Sign out to Sign Out, Register to Join