SPRINGFIELD — With three days of a special session already in the books, a budget compromise for lawmakers remains elusive.Republican Gov. Bruce Rauner called for unity in a rare speech at the Old State Capitol this week. But Democrats labeled it a stunt.   Democratic House Speaker Michael J. Madigan slated hearings on two major topics of Rauner’s agenda — workers’ compensation reform and property-tax freezes — for Thursday and today. But the GOP labeled it a stunt.A meeting …