Monitor Module now has system state

Comment out the listen directive in the ispconfig.vhost file if the port for ispconfig is 80 or 443.

Data records are now assigned to the correct client group if they were created by the administrator.

make sure the symlink with the old name "ispconfig.vhost" is removed before the new one with the name 000-ispconfig.vhost is created.

Fixed #250. Services are only restarted if a startscript is defined in the $config variable during installation or update.

Added a notice to the installer to choose 'y' for apache configuration if the server shall run the interface.

Fixed bugs in installer.
A backup file of the database is stored in /root during update.

added www.-Subdomain option

http://bugtracker.ispconfig.org/index.php?do=details&task_id=295&project=3

It is now possible to add "navigation-text" without links (actions) to the left navigations-side of the template (needed by the monitor module to add the server-dropdown)

Added new table monitor_data for the core-module monitor.

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- updated the debian installation instructions

- Fixed a few bugs in suphp implementation.