Made max zoom for MSR-USGS to be 15.
Made max zoom for MSR-USGS to be 15.

--HG--
branch : js-redesign

dylanfprice/hutmap,muescha/hutmap,dylanfprice/hutmap,dylanfprice/hutmap,muescha/hutmap,dylanfprice/hutmap,muescha/hutmap,muescha/hutmap