Switching test database to modern summary collection

Signed-off-by: Matt Bernhardt <mjbernha@mit.edu>
Add a limit to the Mongo query for overall author reports on the map tab.

This closes #104

Signed-off-by: Matt Bernhardt <mjbernha@mit.edu>
Merge pull request #105 from matt-bernhardt/master

Adding a limit clause to the map query for authors