Add a new user issue

Check for a valid avatar archive directory when adding a new user.
Currency module updates

- Added copyright info to all SimpleCurrency files
- Updated Config/Grid/GridServerConfiguration/GridInfo.ini to use the
correct port, 8003
Updated Gridinfo initialisation

Updated initialisation to add default URI's for viewers if they are not
specified
- Help, About, Registration, Forgotten password
- Added additional debug info in WebInterface to assist calls for
nonexistent pages