removed controlling connections with fling
not checking if levelset directory is a directory, avoiding crash on desktop
creating external levels directory automatically
moved maploading classes to their own package
fixed potential crash when moving null connection
added DesktopKeyboard input class for using keyboard
added enter key for closing map finished dialog
fixed plus and minus buttons to zoom in the correct direction
now reacting on keyDown instead of keyUp
clanup in DesktopKeyboard
added MapLoadingException that is thrown instead of `RuntimeException` when errors occur during map loading
added handling of RuntimeExceptions during map loading
added verification of map border when loading level, fixes #25
added support for more blockLinks in the same layer, blockLinks now use strings for identification
changed tutorial level 7 to use more teleporters in the same layer (issue #26)
added level information labels in top-left
changed package for IntPoint, and Direction4 classes.
made HtmlLauncher compile using a GameHelper
removed badlogic image
fixed bug with `noForward` being alone on an object causing a map validation failure. fixes #30