NumberWeave

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require PyQt5

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version 1.0.1 modifications:

1. modify default window size
2. add a key press event to clear the current cell
3. modify keys
4. split the "to be known" to be a new window so that you will not lose your progress
5. add multiple solutions

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version 1.0.2 modifications:

1. add cell check
2. add undo button
3. add timer
4. add auto-fill cross

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version 1.0.3 modifications:

1. add check against zero row or column
2. add choose mode choice after the game is finished
3. add marker
4. add key direction movement
5. add auto fill crosses rewind
6. fix undo rewind with auto fill crosses

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version 1.0.4 modifications:

1. add action forward