Support GeoJson to Compressed TopoJson

[boundaries-io]

Please add the capability to convert GeoJson to TopoJson.

for example:

		String iJsonC = TopojsonApi.geoJsonToTopojson("./data/MA.geojson", "nad83:2001",
				"MA", 
				10, 
				4, 
				true);

or even FeatureCollection...

                FeatureCollection featureCollection = .....
		String iJsonC = TopojsonApi.geoJsonToTopojson(featureCollection, "nad83:2001",
				"MA", 
				10, 
				4, 
				true);