Nawqaan 381

This is a crude first pass for this ticket.  I have lots of questions about the business rules for calculating the various values for plotting.  This pull request is intended to get an initial review for additional information and direction.
This should either be corrected as they are used in the hover. You should use the CONFIG.startWaterYear and CONFIG.currentWaterYear for these. The average will be from start to current water year - 1. It looks the currentYear series label is hardcoded to 2014 in ConstituentCurrentYearComparisonPlot.js. This should be changed to use CONFIG.currentWaterYear.