Scoreboard

Fields
 * Score
 * Total
 * ?# wrong?

Methods
 * maxScore
 * .inc(val), .dec(val) to increment and decrement score, default change by one if no val supplied
 * reset
 * start

Options
 * startBtn : true
 * resetBtn : true
 * stopBtn : true
 * incValue : 1
 * maxScore : 0

Possibly For future
 * display difficulty level
 * .stop
 * pause score can't be changed