Mark jobs out of quota as blocked for "Quota"

Previously jobs that are blocked without quota are shown
as "Waiting", which in a sense they are.  However, it is
more useful to the administrator and the user if they
are shown as "Quota" instead in the blocked section.
Only display blocked jobs to the user who owns them

Ideally we only want so show a user the blocked jobs that they own,
they may be overwhelmed if there are lots of other blocked jobs by
another user.
Make sure root sees blocked jobs too

Of course root should also see blocked jobs, so allow that.
Merge pull request #2 from chrissamuel/master

Mark jobs out of quota as blocked for "Quota"