Merge pull request #181 from isuftin/master

Finally got cached drought layers to clear themselves
Merge pull request #182 from isuftin/master

Stop updating the URL when clicking an anchor tag
cacheDroughtLayers ajax call explicitly requests application/json in hopes apache/tomcat will send back proper caching headers
Merge branch 'master' of https://github.com/USGS-CIDA/CIDA-Viz
Merge branch 'master' of https://github.com/isuftin/CIDA-Viz

Conflicts:
	Vizzies/public_html/js/main.js