Pre-compute full diversity method for whole db

[vjpsyverson]

Now that the full diversity method is exposed in Navigator (probably going to go to production soon as no-one has yet found any bugs in it), it would be helpful to have a pre-computed result available to the API for that method on the whole database so that it doesn't have to recompute every time someone clicks through to that window without filtering.

[markuhen]

Perhaps in the meantime, you could add a warning when someone tries to do the whole database and ask them if they really want to do that!

[aazaff]

I wrote a shiny app a while back for calculating standardized richness time-series using the API. I found that the longest part was downloading the data, even for relatively smaller subsets of the data - e.g., Cenozoic mollusks. Perhaps pre-calculating richness for a number of common intervals and taxonomic groups would make sense.

[vjpsyverson]

If we want to do that for some of the most common intervals and taxonomic groups, I suggest that we start with the whole database and then start logging all the requests so that we can figure out what taxa/intervals are most commonly requested and maybe consider pre-computing those.