List jobs from the database rather than the cluster

Signed-off-by: Lewis Marshall <lewis@lmars.net>
Update job state in scheduler watchHost

Signed-off-by: Lewis Marshall <lewis@lmars.net>
Track the state of typeless one-off jobs

Signed-off-by: Lewis Marshall <lewis@lmars.net>
Merge pull request #20 from flynn/job-state-awareness

Job state awareness v2