It’s good to be in the construction field this summer in Wellesley. The town’s makeover includes the new maintenance and other facilities at Wellesley Country Club, a sports complex rehab at Wellesley College, sprucing up of downtown buildings, church work, Wellesley Middle School fixer-upper, a new dorm at Babson, Hunnewell Elementary School tidying up, Belclare going up and plenty of road work.