Bom custodian

Added BOM custodian info to point to geofabric data server

Since they're server is currently down I also used it as a testing site for simple server health checks.  This addresses the in client part of #207.

btw: I'm not seeing any significant overhead from doing the check first, but if we see that we can change the succeed function in GeoDataBrowserViewerModel to always go first and make the passed parameter undefined.