Log Message:
Import trac-plugins-RoadmapHours-0.5.4802 as wip/trac-plugins-RoadmapHours.

This plugin uses the custom ticket fields supplied by the
TimingAndEstimationPlugin to provide a Ticket Group Stats Provider
that can be used to show hours on the Roadmap and Milestone progress
bars instead of the count of tickets.  Note that this says 'instead';
it really means instead.