Merge pull request #253 from mbucknell/NAWQAAN-232

Added code to adjust the graph's time axis to show only the time range
Modified TimeSeries to set the timeRange property from the retrieved
data if the time series is created without the timeRange property. 

Modified GraphPopup to adjust the x axis using the timeRange from the
visualization (which is the correct way to do it anyways).

Made other visual tweaks including descreasing the padding between the y
axis label on the load plots and making the MRB load popup longer.