updated stored query script to support multiple baselines

[corviday]

We'd like to shift the plan2adapt baseline climatology from 1961-1990 to 1971 - 2000. PCIC's standard baseline climatology is now 1971-2000. The percentileanomaly API lets the user specify whatever baseline they want as long as that baseline is present in the stored queries, and we have a full set of 1971-2000 anusplin data, so the main issue is changing what baseline we have stored queries for.

I think the smoothest way to do this would be to modify the stored query script to allow it to store results for both baselines. Then we'd have a period where the backend could provide either baseline upon request, and we could seamlessly switch the front end whenever it made sense to.

[rod-glover]

I agree.