Add a contributed script for running Asterisk without installing it, first.

(closes issue #11680)
 Reported by: tzafrir
 Patches: 
       live_ast_6 uploaded by tzafrir (license 46)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@151601 65c4cc65-6c06-0410-ace0-fbb531ad65f3