Merge pull request #27 from ldecicco-USGS/master

Adding unix tests.
Merge pull request #28 from ldecicco-USGS/master

Updating appveyor tolken.
Update README.md
Continue to try to figure out travis and appveyor.
Still futzing.

Merge branch 'master' of github.com:USGS-R/dataRetrieval

Conflicts:
	README.md