change subset length to subset days
fix bug in rvic/time_utility causing restart flag to stay up after restart date
Add example configuration files for convolvution, and parameter programs.
renamed convolution example
Add config and remap to rvic module.

Allows for use of rvic convolution without installing cdo.
Fix bug in downstream count where empty array should have been initialized as zeros.
move remap and config parsing to seperate files

also minor improvements to tar file utility.
Improvements to global netcdf attributes and added history file restart var attributes
Fix bug in downstream count where empty array should have been initialized as zeros.
minor improvements to diagnostic plots
update in global attributes write