* Progress bar now goes away after layers have either loaded or failed.
* Broken layer now shown in map, but others are not.
Layer chooser error is caught in try/catch block.
Now catching error creating layer chooser radio button.
Merge branch 'master' into update-chart-for-service-area
Bugfix: Attempting to startup a legend that didn't exist was throwing an exception.
chartDataProvider: Now calling getSelectionGraphics in constructor.