Changes made in RegisterControllered that stop the war from being
deployed. Problem : Duplicate restful mappings.
Better exception handling added to mysql connector - produces a friendly
log message to the console whenever a connection is not available or
invalid connection parameters are used.
Register updated to connect to mobile phone app

Username and password now being sent to the server, new users are
registered, existing users are checked and the appropriate boolean
values are return in JSON.

Passwords are now hashed using SHA encryption to ensure security.
However passwords are send in plain text over the internet to the
server. Additional work required to ensure passwords are sent to the
server securely.