Issue #22: Modify sample for better view-source
Issue #24: replace old Ocean basemap
Issue #23: change earthquake feed
Remove InfoWindowLabel css from sample, doesn't apply to ContentNavigator.
Updated urls for Mapbox and MapQuest streets urls, fixes #25.
Update sample to use static georss hosted file fixes #26

Future-proof sample by using a static file in the case that NWS website
changes their urls.
update URL
format
Merge branch 'develop'