Merge pull request #2 from isuftin/master

Hello World completed
Added NHDPlus attribution logo, changed z-ordering of controls to avoid unhelpful superposition
spiffing up the attribution logo stuff
Merge pull request #4 from cschroed-usgs/master

Attribution logo
Added an eample context.xml, added a wms getcapabilities geoext store, added a geoserver endpoint parameter
Merging carl's commits, using configured geoserver endpoint in front end app