additions and reroute

[Kistine]

added pie charts that allow filtering the dataset and viz by Year and
Qtr.

also pointed to 'employee_salaries' dataset - not sure why it was
pointing to 'latest_employee_salaries" but that seemed to drop older
info. Is it ok to change this @timwis?

[timwis]

latest_employee_salaries is a view that shows the latest quarter. By allowing you to filter on year/quarter that isn't necessary. The only issue, I imagine, is that when you first load it it will show all quarters combined, which misleading totals. Is that the case? Perhaps you can show me on your computer. A more ideal solution would be a "default filter" rather than a base filter, where the latest quarter/year is selected but could be changed.