Add a details page per commit

[youknowriad]

That page should show the current commit, its description, links... and it should show the values for all the metrics stored for that commit.

[ntsekouras]

Do you mean like a completely separate page that is linked from the graph? I was thinking about yesterday that at least the PR title in the tooltip would be really valuable.

[youknowriad]

@ntsekouras yes :)