Pull request "Compared test results" small feature requests

[mithro]

Here are some "nice to have" feature requests for the cool new "Compared test results" output that has been recently added.

• Colors! It would be nice to highlight;
  • Improvements in green
  • Regressions in red.
  • Non-changes de-emphasized in light grey.
• Link to the published version of the before and after results so people can understand exactly what changed.
• Add git revision information for before / after.
• Add a total at the top.

[mithro]

FYI - @joannabrozek