Gracefully handle jobs that are disabled or never run
Add CSS support for disabled jobs
in place merge job stats
Update rollup for aborted and disabled jobs
Only display non-zero sums in stats rollup
Set job health to 0 when no health exists
Handle jobs that have a status of not_run

This just colors the job as the same color as disabled until we pick out
more specific colors.
Don't wipe job JSON nil values

In order to properly reset Backbone Job objects, we need to be able to
null out fields that have been removed. This commit ensures that we'll
properly wipe the progress_pct and eta fields when a job transitions
from running to another state.
Merge pull request #37 from adrienthebo/support-disabled-aborted-never-run-jobs

Support disabled, aborted, and never run jobs