added banners for location with color

@ltw. Here's a screenshot of our progress with Pairing is Caring. http://i.imgur.com/ZYABghQ.png?1

We implemented background colors and "enbiggenated" the font for mentor availability locations. Now hopefully people won't schedule sessions for cities they don't live in. Yaaaaay.
This is churn and should not be committed. The schema ordering should be preserved by the committer's machine.