LP#1396161: action_trigger_runner.pl documentation update

LP#1396161: action_trigger_runner.pl documentation update

 - Removed --granularity-only help docs.  Ever since the script was changed to
   support parallel execution of different granularity levels the granularity-only
   setting has always been set when using --granularity.

 - Added --verbose help docs.  This option wasn't included in the help docs.

 - Clarification - added some clarification to a few of the help descriptions.

 - Added an additional example for processing hooks and running pending events
   with a granularity set.

 - Removed two references to the --granularity-only flag in the Telephony docs.

I believe this change is valid for 2.7, 2.6 and 2.5 since the change to the script
 was made in 2010.

Signed-off-by: Josh Stompro <stomproj@larl.org>
Signed-off-by: Remington Steed <rjs7@calvin.edu>
Signed-off-by: Ben Shum <bshum@biblio.org>