Merge branch 'master' of https://github.com/nmaguirre/eiffel-sudoku
Merge branch 'master' of https://github.com/nmaguirre/eiffel-sudoku
Unnecessary sudoku_multiplayer.e erased.
Merge branch 'master' of https://github.com/nmaguirre/eiffel-sudoku
remove the unnecesary class SUDOKU_MULTIPLAYER.e
Merge branch 'multiplayer' of https://github.com/nmaguirre/eiffel-sudoku