[Python-3000] Planning to switch to new tracker on August 23rd

[Brett Cannon]

Having squashed the final issues, we are now ready to switch over to
the new tracker!  The plan is to do it on the 23rd.  But before I
announce to the community I wanted to make sure there was not some
specific objection by python-dev or python-3000.  If there is please
let me know by midday Monday so that we can postpone to next week if
needed.

-Brett