added plusminus style sheet and sort the style sheets alphabetically
added plusminus style sheet and sort the style sheets alphabetically

friendica/friendica,fabrixxm/friendica,annando/friendica,friendica/friendica,annando/friendica,friendica/friendica,annando/friendica,fabrixxm/friendica,tobiasd/friendica,tobiasd/friendica,friendica/friendica,tobiasd/friendica,annando/friendica,fabrixxm/friendica,tobiasd/friendica,friendica/friendica,annando/friendica,fabrixxm/friendica,fabrixxm/friendica,tobiasd/friendica