Fixed test to work on Java 8
Conflict generator fixed to generate start-goal avoiding configurations.
GenerateInstance now support parameters -onecluster and -sgavoiding
Cleaned-up conflict generator. Triangulation generator can generate dock positions near the border. Conflicts can be now generated using these "dock" positions loaded from problem xml file.
Refactoring the conflict generator. Work in progress.
added environment bitmaps
Added support for visualizing the background bitmap.
Generated new problem instances.
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