MINNEAPOLIS — Jaz Shelley had 19 points, seven assists and seven rebounds to lead fifth-seeded Nebraska to a 64-56 win over 12th-seeded Purdue in the second round of the Big Ten Tournament on Thursday. Alexis Markowski added 12 points, seven rebounds and six assists in Nebraska’s third win over Purdue this season. Swanson hit a 3-pointer to open the fourth …