Message 144724 - Python tracker

Attached is a patch against trunk branch "2.7" (rev dec00ae64ca8) adding documentation on how to migrate CObjects to Capsules.  Delta the inevitable formatting bikeshedding, this should be ready to go.  I've smoke-tested the "capsulethunk.h" locally and it works fine.

When accepted, I'll check this in to the 2.7 branch, then merge into the 3.1, 3.2, and trunk branches.