SERIES PREMIERE: Last year, the CW gave us one of the best new shows of the season, somewhat unexpectedly, with Jane the Virgin. This year, the CW introduces only one new series for fall, but, once again, it’s hit the ball out of the park. Crazy Ex-Girlfriend, premiering tonight, stars Rachel Bloom as a young, Ally McBeal-ish lawyer who impulsively moves to a Los Angeles suburb to be near a former teen crush whom she just encountered on the street in New York, and who mentioned he was movi