Build mkgmap/splitter #182

- extract the area handling from interface OSMWriter to abstract class BoundedOsmWriter - new Processor CopyProcessor to convert a single osm file to o5m or osm.pbf similar to osmconverter with options --drop-version --drop-author - process bounds without rounding to map units (new class OsmBounds) Conversion can be done with java -cp dist\splitter.jar uk.me.parabola.splitter.Converter <infile> <outfile> The file format is determined by the extension of the <outfile> Possible future use: Create on-the-fly copy of a *.osm.pbf in first pass if that improves overall speed