Create a kml2pack using the pack() methods already in geodata classes

• You can use the tools provided under the tools directory as a kind of template code
• Have a look at the "KML parsing tutorial" for C++
• Create a command line tool that parses KML files into a GeoDataDocument.
• Save the whole GeoDataDocument via the pack methods that are available in all GeoData classes
• At the end there should be a cache file created by the tool.
• Unit test will be done as part of a different task.