'**SUMMARY**
This is the y coordinate of the centroid for the minimum bounding rectangle
**RETURNS**
An integer that is the y position of the centrod of the minimum bounding rectangle.
**EXAMPLE**
>>> img = Image("lenna")
>>> blobs = img.findBlobs()
>>> print blobs[-1].minRectY()'

def minRectY(self):

    return self.mMinRectangle[0][1]
