Add game state enum. Add callback when game ends
Throw exception if no more shapes left
Remove null shape. Using exception instead
Use try catch block to test end game state
Throw error if blocks reach top of board
Add some comments for end game
Move reflex speed value to variable
Add a comment
Add some new styles for tetris
Add a few new ui components.

Computer board. Score board. Controls
Refactor use of underscore random and add some dimension settings
Add option to remove stroke in style
Temp commit here.