Package idea: summary dashboard

[blahah]

Show a dashboard summarising search results, perhaps sitting in the space to the right of the search bar, with cards that can also be separate packages.

For example:

• histogram of date distribution
• top ten authors by number of authored papers in the result set
• top ten annotations of any given kind (see #16)
• most cited papers in the results

[blahah]

I made a demo of this - in the cm_demo branch...