Acknowledge dstufft on security.txt
Release 0.22.21
Bump version to 0.22.21-dev
Allowing for python3 in Makefile
Installing six per existing pattern
Upgrading virtualenv

since 1.7.1.2 wasn't playing nicely with python3.3.  I didn't look very
hard.  Maybe it was my python2.7-specific PYTHONPATH that was to
blame...
Adding a separate dependency installer script

since pip seems to be doing something special (not simply running
`setup.py install`) and is choking on encoding hint cookies in comments.
wat.
Adding a comment to clarify the change to `PYTHON` make var
Upgrading nosexcover

as version 1.0.8 introduces py3k compatibility.
Importing cookie stuff either way
Importing urlsplit and StringIO both ways
Importing _thread both ways
Using print function, dangit! :D
Catching exceptions with "as"
Using function form of `exec`
More str/unicode/bytes (un)tangling in request lib
A bunch more except, import, and exec changes for py3k
More binary/unicode stuff
Bumping Tornado to 3.0 for py3k compatibility
Updating windows build script to use upgraded virtualenv script