Adds a simple text item to this group.
        
        :param      text            | <str>
                    maximumWidth    | <float> || None
                    maximumHeight   | <float> || None

def addText(self, text, width=None):
        """
        Adds a simple text item to this group.
        
        :param      text            | <str>
                    maximumWidth    | <float> || None
                    maximumHeight   | <float> || None
        """
        item = QtGui.QGraphicsTextItem()
        
        font = item.font()
        font.setFamily('Arial')
        font.setPointSize(12)
        item.setFont(font)
        
        item.setHtml(text)
        item.setDefaultTextColor(QtGui.QColor('white'))
        self.addToGroup(item)
        item.graphicsEffect().setBlurRadius(8)
        
        if width:
            item.setTextWidth(width)
        
        return item