Merge pull request #29 from ldecicco-USGS/master

Readme cleanup.
Update README.md
Merge pull request #30 from ldecicco-USGS/master

Update README.md
Trying to figure out issue with ref merges.
Merge branch 'master' of github.com:ldecicco-USGS/dataRetrieval
Merge branch 'master' of github.com:USGS-R/dataRetrieval