A federal judge cleared the way — at least for now — for people to evangelize, circulate petitions and engage in other forms of expression in Millennium Park.In a preliminary injunction issued last week, U.S. District Judge John Robert Blakey barred the city of Chicago from enforcing one rule prohibiting conduct that “objectively interferes” with others’ enjoyment of the park’s art and another rule limiting speech-making and the distribution of written materials to a certain area of the …