'**SUMMARY**
This method returns the angle between the horizontal and the minimum enclosing
rectangle of the blob. The minimum enclosing rectangle IS NOT not the bounding box.
Use the bounding box for situations where you need only an approximation of the objects
dimensions. The minimum enclosing rectangle is slightly harder to maninpulate but
gives much better information about the blobs dimensions.
**RETURNS**
Returns the angle between the minimum bounding rectangle and the horizontal.
**EXAMPLE**
>>> img = Image("lenna")
>>> blobs = img.findBlobs()
>>> blob[-1].angle()'

def angle(self):

    retVal = 0.0
    if (self.mMinRectangle[1][0] < self.mMinRectangle[1][1]):
        retVal = self.mMinRectangle[2]
    else:
        retVal = (90.0 + self.mMinRectangle[2])
    retVal = (retVal + 90.0)
    if (retVal > 90.0):
        retVal = ((-180.0) + retVal)
    return retVal
