Added TrailEntity for creating trails
Added TrailEntity for creating trails in order to create trails call 
TrailEntity trail = new TrailEntity(world,xcoord of object ,ycoord of object,zcood of object place 0f for now ,image for trail to draw ,delta,rotation of object image , object image .getCenterOfRotationX(),object image.getCenterOfRotationY(),object image.getWidth(),life span you would like for trails to stay);
Added the ability for the tank to create treads and got ride of some of the hard code