moved Board.py into package 'Tetris/'
basic attributes of the game board
added start method to start the game
__init__() will immidiately start the game by calling Board.start()
pause() implemented
added pause related attributes and routines
keyPressEvent() introduced to use p key for pause
fixed typo
added statusbar, placed widget tetrisboard in center of the window
focus is put on Board so that key input will be directed in it.