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Merge branch 'master' of https://github.com/MoritzD/FreeFlow

Conflicts:
	out/production/FreeFlow/com/example/FreeFlow/Board.class
	out/production/FreeFlow/com/example/FreeFlow/Cellpath.class
	out/production/FreeFlow/com/example/FreeFlow/Challenge.class
	out/production/FreeFlow/com/example/FreeFlow/ChallengeAdapter.class
	out/production/FreeFlow/com/example/FreeFlow/ChallengeList.class
	out/production/FreeFlow/com/example/FreeFlow/Global.class
	out/production/FreeFlow/com/example/FreeFlow/MainActivity.class
	out/production/FreeFlow/com/example/FreeFlow/PackAdapter.class
	out/production/FreeFlow/com/example/FreeFlow/PackList.class
	out/production/FreeFlow/com/example/FreeFlow/PlayActivity.class
	out/production/FreeFlow/com/example/FreeFlow/Puzzle.class
	out/production/FreeFlow/com/example/FreeFlow/PuzzleAdapter.class
	out/production/FreeFlow/com/example/FreeFlow/PuzzleGrid$1.class
	out/production/FreeFlow/com/example/FreeFlow/PuzzleGrid.class
	out/production/FreeFlow/com/example/FreeFlow/R$drawable.class
	out/production/FreeFlow/com/example/FreeFlow/R$id.class
	out/production/FreeFlow/com/example/FreeFlow/R$layout.class
	out/production/FreeFlow/com/example/FreeFlow/R$string.class
	out/production/FreeFlow/com/example/FreeFlow/R.class