BOULDER - Students were preparing to spend the night at Boulder High School Thursday to protest policies of the Bush administration. About 50 students carrying guitars and boxes of crackers and Froot Loops took over part of the library at the end of the school day. They vowed not to leave until they had a chance to meet with elected officials. Under an agreement with Principal Ron Cabrera, they were allowed to stay the night, but must clean up and be gone by 7 a.m., when the library opens. A teacher and several parents agreed to be chaperones, Cabrera said....