Fix for Redmine #1591: 

The user is diverted to a warning page when the dates they select in ED are outside the bounds of the selected weather data file. The user is given the option to continue anyway
or return to selectdata with their previous options pre-selected.

**There still appears to be a problem with met that I likely introduced. When running in ED2 with ebifarm and the ebifarm.grass3 pft, giving bad dates caused a fatal error. It occurred in run stage 2 in ed_met_driver.f90, saying "Cannot open met driver input file /home/cohen24/sites/ebifarm/ebifarm_2003JAN.h5!"

Rob told me to send this request and move on.