Make the teams page a little easier to use.
* Add section titles for clarity and for hrefs, so you can link to say
the mission of a team (neutron.html#mission)
* List each tag on its own line. As the number of tags grow putting all
the tags for a given repo on a single line will become unwieldy.
Change-Id: I1aef7897f718ab851a5ac83a1a979ee8ca48f6c2
86108189be