Simple threaded support messages (via RE: in subject)

Fixed not used and prepared config variable $misc_config['dashboard_atom_url'] in dashboard news feed.

Added missing strings in some templates to english transalations

Implemented: FS#1325 - Option to create remoting user automatically during package installation from repository
Implemented: VAT-ID and customer No. fields for client and reseller.

Fixed: FS#1285 - Support messages are not listed for the client under Help > Support > View messages 

Fixed: FS#1269 - Field "Max. type of cron jobs (chrooted and full implies url)" in Client limits is misleading 

Fixed: FS#1275 - Port 8081 (apps vhost) should be included in the default open TCP ports in the firewall 

Fixed: FS#1313 - Email > Global Filters > Postfix Whitelist > Add new Whitelist record: "Witelist Address" typo 

Fixed a small bug in the nav.php which tries to lookup a custom module config file even if no module is selected and  enabled the dashboard module for the admin user by default after installation.

Added the configuration variable $conf['demo_mode'] in the config.inc.php file. It disables the newly introduced demo mode which limits certain actions in the interface part of ispconfig: the demo mode can be used to run the ispconfig interface part as online demo.

Removing white space in the remote_user.tform.php file while calling the client_template_get_by_user function. Reported by ispcomm