by Christina Smith If Jezra Williams had it her way, plus-sized models would be featured on every runway, at any and all fashion shows- from local and international. In addition to flying the Vincentian flag during New York Fashion Week, the 37-year-old body-positive activist also represented for full-figured women. She lived out a childhood dream of hers on September 11 when she owned the runway at the Parsons MFA Show …