bug 1077988, make team page more compact, and sign-off info more useful, r=adrian.

Compact the team page by moving the product into a column, and generally
reduce line heights.

This patch also reworks how we're showing Sign-Offs and the l10n progress
around those.
Actions are now shown in chronological order, and there's a status indicator
column that presents statuses like good, up-to-date with missing strings,
etc.