Labels: Use shades of gold on mileposts

The blue color does not go well with the
gray and black on the mileposts and
next-meeting colors. Try shades of gold
instead.
Docs: Add features since 0.7 and review

Add some basic information about the major
features of the site that we've added since
0.7: labels, multi-story entry, invites,
mindsets: bump and roadmap.