Make sure we don't register the datasource listener twice
Make sure we don't register the datasource listener twice

oaubert/TwitterFontana,EightMedia/TwitterFontana,EightMedia/TwitterFontana,oaubert/TwitterFontana,oaubert/TwitterFontana,karankashyap/TwitterFontana,karankashyap/TwitterFontana,karankashyap/TwitterFontana,karankashyap/TwitterFontana,EightMedia/TwitterFontana,oaubert/TwitterFontana