New York City Mayor Bloomberg and City Council Speaker Quinn speak during a press conference in New YorkNEW YORK (Reuters) – New York Metropolis Council Speaker Christine Quinn, regarded as a front-runner to be New York's subsequent mayor, officially launched her candidacy on Sunday for the job that would make her the city's first feminine and first openly homosexual mayor. The Democratic Quinn, forty six, made her announcement on Twitter, announcing: "It's reputable. I'm running for mayor to combat for the center category." In a video linked to her tweet, Quinn talked about the importance of safe streets, improved schools, affordable kid care and housing and the introduction of excellent-paying jobs. (http://www.quinnfornewyork. …