Render blame in a table with server-side syntax highlighting

This is likely the fastest pure HTML layout possible. The main
downside is the lack of multi-line selection, but since this is
available in the default blob view it's unlikely to be missed. The
Chrome team's experience with ViewVC (see Issue 5) supports this.

Change-Id: I9a67373f32c85a12516e92121a7ebdcbe07088ed