Label genomes when comparing gene lists

[eweitz]

This adds an organism name atop each genome when comparing multiple genes across species.

That enables users to better understand what they're looking at, without needing to consult a caption.

Example:

[coveralls]

Coverage decreased (-17.7%) to 72.854% when pulling 8a10a4a on label-genomes into c99559b on master.

[eweitz]

The note on "Coverage decreased (-17.7%) to 72.854%" is incorrect. It was based on a transient test failure, and did not update upon the test passing.