Some of the biggest dollar amounts in the bonding bill approved by the legislature are for Minnesota's two public higher education systems. There's money for new libraries, classrooms and even some money for salaries of professors and staff. Minnesota Public Radio's Dan Olson has more. Walter Library, one of the University of Minnesota's best known buildings on the Minneapolis campus, will be revamped. Lawmakers approved spending more than $53 million to make Walter library into a digital science and technology center. University of Minnesota provost Bob Bruininks (Broo ninks) says the decision to keep Walter is based on part on its central location on the University Mall and it's historical significance. audio . . .there'll be obviously a significant