Merge pull request #247 from mbucknell/NAWQAAN-232

Fixed test that broke when we flipped the water year calendar.
NAWQAAN-303: fixed NLCD map url
Merge pull request #248 from mamcderm-usgs/NAWQAAN-303

NAWQAAN-303: fixed NLCD map url
The $.ajax call was using the fail property rather than error to handle
service errors. Added tests to test the service call for both successful
and error responses.
Remove the plotContainer from the DOM if the data retrieval fails.
Added Definitions.js which is needed for the time series visualization.
Cleaned up the code to improve error handling and cleanup.
Adjusted some CSS tweaks so that the annual/may plots on the Mississippi
page display nicely.