Re-apply the google patches from scratch.

This subrepo had gotten really messy over the years, to the extent
that every time I wanted to pull from upstream, I had to do a dozen
annoying merges.  I'm sure someone with more git-fu could have fixed
that without the drastic measures I took, but I did it the
drastic-measures way: reset our version of pympler to upstream, and
then re-applied the (very few) changes that we actually want.  This
commit does that second step.

The three changes we still need are:

1) Disabling tkinter.
2) Working without linesep (not needed anymore everyone is on GAE 1.8,
   but I kept it anyway)
3) Working without statvfs, which GAE doesn't support.

Auditors: chris

Test Plan:
Fingers crossed.