add a date string conversion function for datetime objects to '%Y-%m-%d' format. datetime.strftime errors out for years < 1900
add a date string conversion function for datetime objects to
'%Y-%m-%d' format. datetime.strftime errors out for years < 1900

cameronbracken/ulmo,nathanhilbert/ulmo,cameronbracken/ulmo,ocefpaf/ulmo,nathanhilbert/ulmo,ocefpaf/ulmo