Create clean 'most important metrics' page

[TeaganKing]

We'd like to gather the top ten or so most important metrics from across numerous components and include them on one 'quick-look' page.

This would be great to have relatively soon (eg, prior to May 9th CGD Exchange), because it would increase the usability of CUPiD in CESM Development and simplify the user experience while looking at output.