This relates to #609.
Provides a web interface to:
See pollers and their performance.
Create / Edit / Delete poller groups.
Provides a console interface to:
List, Register and Unregister pollers.
List poller groups.
Added Performance menu to System and add pollers page
Added missing tab=
Updated checks on poller time
Web ui and console files needed for monitoring pollers
Added support for managing poller groups and viewing poller stats
Updated dist-pollers.php to support poller groups
Updated to remove the pollers menu if distributed poller is not set
Added support for adding / editing with a poller group selected