Generate dygraph legend on server; dygraphs can't do what we need.
Graph legend from server side.
Merge remote-tracking branch 'upstream/master'
Fuss with page template, to have a place for styles.
Color generator class.
Merge pull request #13 from rhayes-cida/master

Generate dygraph graph legend on server.
Merge remote-tracking branch 'usgs_upstream/master'

Conflicts:
	dj_eden_app/templates/hydrograph_query.html
	dj_eden_app/views/page.py
merged in changes to page.py and hydrograph_query.html
first cut at NGVD29 axes on server side