implemented level-drawing capabilities
added pause graphic
added "YOU LOSE" dialog
restrict movement when paused, all input after losing
halt logic and input when paused / lost
increase game speed at constant rate
spawn dominos higher up on board
implemented a flood fill to fill in pieces after clearing a line
flood fill blocks each time a line is cleared
keep track of what next domino will be
full refactor. moving all logic from main class to Pit
added two new classes for refactor
fixed infinite loop in line checker
enforce lose state (no input)
removoed rotation TODO
new publicly accessible clear() method
added new grid clear feature for convenience
large refactor, added packages for organization
abstracted scoreboard drawer into an opengl string drawer
created a start menu with its own input handler