Add Victoria to National Map

* Adds the CKAN-derived Victoria data to the official catalog.
* When an alphanumeric hash is added to the URL (for example, `http://nationalmap.nicta.com.au#vic`), a corresponding init file (for example, `init_vic.json`) is loaded.  The init file can specify an `initialCamera` property (National Map will fly to this extent) and an `initialDataMenu` property (this collections file will be loaded and added to the catalog).
* Implements the above for `#vic`.
* Layers with a `MaxScaleDenominator` are now filtered out when discovering layers via WMS GetCapabilities and CKAN query