Upgraded the EaselJS to version 0.7.1. Changed the tick event listener and stage mouse handler to work in 0.7.1 version.
Added getPaused to tick functions because 0.7.1 will still call the tick functions after Ticker is paused. (the pause is just a boolean flag now)
Fixed an issue that access the removed coins object.
Changed to use Sprite instead of BitmapAnimation. According to the 0.7.1, BitmapAnimation is deprecated.