Set alpha for est, dry series on dygraph.
Propagate dry and ground elevation to JavaScript variables.
Added ground and dry elevation marks for 1-gage dygraph.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	dj_eden_app/templates/hydrograph_query.html
Merge pull request #12 from rhayes-cida/master

Fancier dygraphs