Write ymd_queued to manage /var/spool/asterisk/outgoing

Right now, if a large job were queue'd, or if multiple jobs were queue'd simultaneously, it would overwhelm the available bandwidth, resulting in garbled message delivery. We need to seperate the queue'ing of jobs from the task of feeding them into the spool. I'm proposing a distinct daemon which will watch the queue and the spool and manage the flow of call files into the spool at a pace which should not overwhelm the bandwidth.