[Buildbot] #2950: re-implement progress

[Buildbot trac]

#2950: re-implement progress
-------------------+-------------------
Reporter:  dustin  |      Owner:
    Type:  task    |     Status:  new
Priority:  major   |  Milestone:  0.9.+
 Version:  master  |   Keywords:  eta
-------------------+-------------------
 In #2818, I'm removing support for progress as implemented via the status
 API.  It should be re-added!

 ETA needed a lot of work, anyway -- see

 [[TicketQuery(order=priority,status!=closed,keywords~=eta,format=table,col=summary|owner)]]

--
Ticket URL: <http://trac.buildbot.net/ticket/2950>
Buildbot <http://buildbot.net/>
Buildbot: build/test automation