Use WSGIDaemonProcess

Following suggestions on
 http://code.google.com/p/modwsgi/wiki/IntegrationWithDjango
run cobbler_web under its own process group. Aside from proccess
separation, this allows restarting cobbler_web following cobblerd
without restarting the entire web server.
Restart cobbler_web after cobblerd restart

mod_wsgi will reload the process if cobbler.wsgi is touched, doing so
avoids restarting apache and disrupting other users / processes to
update cobbler settings.
Merge pull request #574 from mark987/wsgi_daemon

Wsgi daemon