Merge pull request #40 from ldecicco-USGS/master

Final CRAN updates.
Merge pull request #41 from ldecicco-USGS/master

Reducing example times even more.
Merge pull request #42 from ldecicco-USGS/master

Description title and readme.
Merge pull request #43 from ldecicco-USGS/master

Bumping up version number for development.
Update README.md
Update README.md
Re doing license with CC0.