Harbaugh is coy about Crabtree’s return

Two-plus weeks ago, the window opened for 49ers receiver Michael Crabtree to return to practice. On Tuesday, coach Jim Harbaugh tried to avoid providing a timetable for Crabtree’s arrival. Asked if Crabtree’s return in a few weeks is “still doable,” Harbaugh had this to say:  “That’s doable.  I’m not going to make any proclamations or…