climate data extraction optimized for time-series vs geographic

- permutate nc files with: ncpdq --no_tmp_fl -h -O -a
latitude,longitude,time $name $newname
- average time for calc.ScenarioWeather() decreased from 29 s to 1.8 s
- added checks to each downscaling option
- fixed a bug in controlExtremePPTevents() where a new day past the end
of the year may be created in error
- to do: access of nc files for many sites instead of one site per call