Add dial events to app_queue and app_followme.

Also fixes an issue in app_dial, where the channels were swapped on dial events.

(closes issue ASTERISK-21551)
(closes issue ASTERISK-21550)

Review: https://reviewboard.asterisk.org/r/2549/


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@389492 f38db490-d61c-443f-a65b-d21fe96a405b
Remove bad props, before anybody notices.

git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@389505 f38db490-d61c-443f-a65b-d21fe96a405b