quadrapassel 51.alpha
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* Updated translations: Lithuanian (Aurimas Aurimas Černius), Russian (Sergej A.),
			Belarusian (Vasil Pupkin)
* Fixed a bug where blocks would not stop moving if the game lost focus
* Fixed a bug where game keys wouldn't work once if they were pressed before to starting a game
* Added a -1 difficulty, where the level never increases