Three years ago, voters in Minneapolis overwhelmingly approved a $110 million bond issue to build a new downtown library. But that was before the tech bubble burst, before 9/11, and before Minnesota’s largest city became a primary target in a statewide budget-cutting push by Governor Tim Pawlenty. The city council is determined to move ahead with the project, and groundbreaking is set for this week. But a significant chunk of money must still be raised from private sources, and a shortfall could affect the design of the building and its surrounding area, and could even cause funding to be diverted from branch libraries elsewhere in the city.