Simplify login server.
Change 'login_tokens' to 'sessions' in API.
Remove unnecessary line.
Start changing references in login server, from 'token' to 'session'.
Pass data object as intended.
Clean up object passed back to user on successful login.
Remove unused dependency 'node-uuid'.
Trim gateway server 'login' logic.
Change comment.
Remove gateway to login server logic.
Comment out 'connect to zone server' code.
Verify session is valid and welcome user.
Create a UUID helper.
Fix support for getting users by UUID.
Fix welcome back message.