Add quarterly reports

[RCheesley]

It would be super helpful to have a quarterly as well as monthly/annual report.

I think that it could be useful to compare to:

• Previous quarter and/or
• Same quarter last year

It may also be nice if there was some way to show projection based on averages or something like that (eg if these numbers continued then at the end of the year ...) but that may not be feasible (or even helpful!)