release 0.1.3

• small GUI improvements
• faster solver algorithm
• program solves the Programming Challenge 19 if the input file name (like "tiles.txt") is given as command line argument. result: Total Moves = 20708; runs less than 2 minutes. http://cplus.about.com/od/programmingchallenges/a/challenge19.htm

release 0.1.2

• fixed a small bug in settings dialog
• compatible with Java 6 or higher

release 0.1.1

initial release, with solver algorithm working and integrated into GUI.