ATS Release 1.0.0

Release 1.0 brings together major changes that have happened from 0.88, including improved evapotranspiration models, greatly improved documentation and example problems, and ongoing work in sediment and other development areas. We're also very excited as we're ready to call the base capabilities of hydrology, freeze/thaw, and ecohydrology on watersheds mature enough to be 1.0. This release partners with Amanzi's release 1.0.

This is a big milestone for Amanzi and ATS development teams -- thank you all so much for all of your hard work!