added another deadlock pattern generator
Merge branch 'master' of https://github.com/milseman/sokoban.git
Added new solver that iteravely tries to solve a map with a heursit that
pushes a box always only to one goal.
Also changed the HashSets to LinkedHashSets in the Board for the boxes
to achieve this.
Merge branch 'master' of https://github.com/milseman/sokoban.git