The "Angry Mermaid" float from 'tit Rex's 2011 parade. (Photo courtesy of titrexparade.blogspot.com) by ELIZABETH PEARCE on FEBRUARY 10, 2012 in ARTS & CULTURE, EVENTS, THINGS TO DO   During Carnival weekend, super krewes roam the streets of Uptown and Mid-City. But this Saturday, the Krewe of ‘tit Rex, which rolls through the Bywater and Marigny, makes the case that smaller can actually be better. Dubbed New Orleans’ only micro krewe, ‘tit Rex’s floats are miniature jewels, every bit as