'**SUMMARY**
Initializes all the required parameters and attributes of the class.
**PARAMETERS**
* *img* - SimpleCV.ImageClass.Image
* *bb* - A tuple consisting of (x, y, w, h) of the bounding box
**RETURNS**
SimpleCV.Tracking.TrackClass.Track object
**EXAMPLE**
>>> track = Track(image, bb)'

def __init__(self, img, bb):

    self.bb = bb
    self.image = img
    (self.bb_x, self.bb_y, self.w, self.h) = self.bb
    (self.x, self.y) = self.center = self.getCenter()
    self.sizeRatio = 1
    self.vel = (0, 0)
    self.rt_vel = (0, 0)
    self.area = self.getArea()
    self.time = time.time()
    self.cv2numpy = self.image.getNumpyCv2()
    return self
