Added example biodata xml doc, helper function, and link to prototype.
Merge branch 'master' into WATERSMART-117
Added biodata site selection to ui.
Added ability to send user to BioData Retrievals with preselected sites.
Improved help dialog display.
implemented buggy control switching functionality.
Fixed site/huc selection control switching functionality.
Merge pull request #24 from cschroed-usgs/WATERSMART-117

Watersmart 117