New strategy (naked twin)
Added explaining comment
Added stuff
Merge branch 'master' into nakedtwin
Merge branch 'master' into nakedtwin
Naked twin strategy complete
Merge branch 'master' of https://github.com/joukevandermaas/sudoku

Conflicts:
	src/NakedTwinStrategy.java
	src/Solver.java
	src/SudokuApp.java

merge
Updated comments
Merge branch 'master' of https://github.com/joukevandermaas/sudoku