Added new heuristics
Merge branch 'master' of https://github.com/milseman/sokoban.git
Added a new heuristic that regards save positions on the map.
Merge branch 'master' of https://github.com/milseman/sokoban.git

Conflicts:
	src/ai/sokoban/representation/Board.java
	src/ai/sokoban/representation/Position.java
Updated get sorrounding method to fetch the positions next by.
Added logging
Added number of solved boards to each solver for the evaluation.
Set value that maximizes solved boards for heuristic with save positions
Added new package for heuristics
Merge branch 'master' of https://github.com/milseman/sokoban.git
Adapted values for testing
Merge branch 'master' of https://github.com/milseman/sokoban.git