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
Merge pull request #322 from mwernimont/master

hyperlink to usgs.gov
minor text and link edits from S Cooper
usgs footer
Merge pull request #324 from mwernimont/master

usgs footer
Merge pull request #323 from eread-usgs/master

minor text and link edits from S Cooper