app_dial/app_queue: Update application option documentation

* Update the post-answer documentation and example.  The Dial example was
incorrect and misleading for the post-answer subroutine useage.

* Fix note and warning paragraphs in option descriptions.  They don't show
up in the wiki.

Change-Id: I81019a1fd75d5b9151f76b52c38e2a90da682d14