'**SUMMARY**
Return true if a particular color is in our color model.
**PARAMETERS**
* *c* - A three value color tupple.
**RETURNS**
Returns True if the color is in the model, False otherwise.
**EXAMPLE**
>>> cm = ColorModel()
>>> cm.add(Color.RED)
>>> cm.add(Color.BLUE)
>>> if( cm.contains(Color.RED) )
>>>   print "Yo - we gots red y\'all."'

def contains(self, c):

    return self.mData.has_key(np.right_shift(np.cast['uint8'](c[::(-1)]), self.mBits).tostring())
