Refactored the time series and plots javascript files so that they are
no longer in the subdirectory full_report nor in the namespace
nar.full_report. They each have there own directories and namespaces
(nar.timeSeries and nar.plots). I moved WaterYearUtils.js to common as
that seemed appropriate.
Changed the moving average line to black per product owner request.
Fixed a typo in sample_concentration_plot.js
Took TimeSeries.TimeRange out of TimeSeries.js and put into its own
file.
Merge pull request #259 from mbucknell/NAWQAAN-65

Refactored the time series and plots javascript files so that they are