Marky branch

@sli-fox @AjayAujla @jeremy091 @mdubey2014 

Fully integrated Ajay's Player{} class.
Towers now use a Timer to attack depending on their Upgrade Level.

Upgrade_0 attacks 1 shot per second.
Upgrade_1 attacks 2 shots per second.
Upgrade_3 attacks 3 shots per second.

Balle ballee!