fixed the sessions/clid mappings
fixed Scheduler.schedule_command()
added the SessionPool class
fixed log broadcasting
added TaskPool.ssid
handled errors in task run
added Task.pool
reported errors in task run
added Behaviour.popen()
instantiated behaviours in Command.get_behaviour()
added Behaviour.task
added task.ssid
fixed gmbexec logging
added PipeThread
added stderr pipe to gmbexec()
added Task.rdepends
typo
cancelled all rdepends after a failure
cleanup
stripped log lines in PipeThread