updated colors

re-formatted a bit, added entries for future colors ammonia and orthoP
site text changes
added graph for nitrogen

also added unused constituents
remove unused class
rolling back
switch x axis labels to month/year
Merge pull request #153 from marsmith/NAWQAAN-173

NAWQAAN-173
Merge pull request #155 from marsmith/NAWQAAN-239

Nawqaan 239
Changed glyphicon to a stats symbol
Merge pull request #156 from isuftin/NAWQAAN-157

Changed glyphicon to a stats symbol
Merge pull request #154 from mwernimont/sitetext

site text changes
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