added river, political and coast types
CoastLineWriter now also writes political and river lines
QuadTree now uses an enum map to contain different types of roads instead of several sublists
added coastdata class which extends the basicData class
added abstract class basicdata
added political data class
added riverdata class
coastlinewriter now reads different files for political, river and coast data and writes to three separate files
krakloader now also loads rivers, coast and political borders
added javadoc
merged new structure of quadtree and additional data types