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
Merge pull request #319 from jread-usgs/master

fixing hanging mouseover
adding onclick NWIS links
median instead of mean
median instead of mean
Merge pull request #320 from jread-usgs/master

median instead of mean. NWIS link sites
date featured
Merge pull request #321 from jread-usgs/master

date featured
hyperlink to usgs.gov