Illustrates how to install elevation data into a World Wind 
FileStore.
 
 Elevation data is installed into a FileStore by executing the following steps: 
 - Choose the FileStore location
 to place the installed elevations. This example uses the FileStore's install location. 
- Compute a unique
 cache name for the elevations. In this example, the cache name is "Examples/ElevationsName", where "ElevationsName"
 is the elevation data's display name, stripped of any illegal filename characters.
- Install the elevations by
 constructing, configuring and running a TiledElevationProducer.
- The
 elevation data is subsequently described by a configuration Document, which we use to construct
 an ElevationModel via theFactorymethodFactory.createFromConfigSource(Object,
 gov.nasa.worldwind.avlist.AVList).