fixed typos in headers and updated README.md to reflect recent changes
Merge remote-tracking branch 'usgs_upstream/master'

Conflicts:
	dj_eden_app/eden_headers.py
added function to plot ground elevation for a single gage
Merge remote-tracking branch 'usgs_upstream/master'

Conflicts:
	dj_eden_app/hydrograph.py
revert to previous version of hydrographs.py
added a function to display dry level on server side plots. it seems it
was beaten to the punch. =)
made current server-side plot include ground level.
Merge pull request #6 from ayan-usgs/master

merged in Roger's changes, added dashed line style to ground elevation line