New color scheme, color coding, pull count.

Brian didn't like the oh-range, so now we have a lovely pastel
that he picked. Yay, pastels!

Also colorize the CR/QA displays so that it's easy to see, at a glance,
which pulls meet requirements.

Also added a count of the number of open pulls in the navbar. It's easy!

Still to come: CSS cleanup. It's like a sewer.