Blender Git Loki

Better progress info for physics baking:
* Using the job system for physics baking is not yet in the near future, so here's some good old console based progress info to all point cache based physics baking.
* The info contains current total bake time, baking time for the current frame, and a simple estimate of completion time.
* The info is only shown if the estimated total time for the bake is higher than one minute, so quick bakes don't suffer any performance hits due to console printing.