MathDoku Notable

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ver.1.08
- New puzzle generation algorithm(Now 8x8/9x9 Hard level puzzles are very hard)
- Puzzle stock update

ver.1.07
- Puzzle generation algorithm improvements(reduced difficulty variance in Hard level)
- Reduced puzzle stock data size

ver.1.06
- Puzzle generation algorithm improvements(generates Hard level puzzles slightly harder than the previous version)
- Puzzle stock update
- Added difficulty level Medium to 4x4 and 5x5 size puzzles
- Added Google +1 Button to the main screen