Merge pull request #316 from jread-usgs/master

updates for revisions, fix for drought color order
usgs header
merge conflicts
Merge pull request #317 from mwernimont/master

USGS Header
Updated with Nov 11th data
Merge branch 'master' of github.com:USGS-CIDA/CIDA-Viz
Merge pull request #318 from lawinslow/master

Nov 11th update
adding doc.set instead of setters
legend function
fixed hung-up tooltips
removing setters
remove set elements
fixing hanging mouseovers