Added the year data to the view and used it to construct the Year pick
lists. Filled in the pick lists for load and nutrient type. Added the
new file loadSelect.js which manages the filters and displays the
correct layer and style for the Nutrient Load layer.
Merge branch 'master' of github.com:USGS-CIDA/nar_ui into NAWQAAN-285
Merge pull request #206 from mbucknell/NAWQAAN-285

Nawqaan 285