added method in Model for retrieving closest road/Data, similar to getRoadName
added new jmenuitem for clearing to and from and restructured to and from into giving coordinates which does match some road
changed IModel to reflect new method getClosestRoad in Model
updated IGUI to have methods for clearing to and from and to calculate path when having both to and from
updated GUI to reflect changes in IGUI
updated mapview to have methods for determining whether or not to and from addresses are present and for clearing them both