Expose 3-column data as URL, for dygraphs.
Daily and hourly data download (with computed flag column).
Downloads for daily and hourly, with computed flag column.
Merge pull request #4 from rhayes-cida/master

Daily and hourly data
Merge remote-tracking branch 'usgs_upstream/master'

Conflicts:
	dj_eden_app/eden_headers.py
added function to plot ground elevation for a single gage