Adds console renderer to merger backend.

This CL:
a) creates a backend url that serves a merged console table (sans surroundings,
javascript, announce header, and css).
b) does some minor cleanup of the other backend code;
c) changes tests to reflect slightly modified data storage formats; and
d) still doesn't affect the current front-end.

The next (and final, in this project) CL will:
a) add pre-rendering and caching; and
b) change the frontend to use this new renderer.

Review URL:

git-svn-id: svn:// 0039d316-1c4b-4281-b951-d872f2087c98
21 files changed