Kill twitter.common.python vestiges

[kwlzn]

a while back, twitter.common.python became pex. there are still references to twitter.common.python scattered in the code base - particularly, a failure in the release script:

                   Running register sdist upload against /Users/kwilson/dev/commons/dist/twitter.common.python-0.7.0**** Failed to install twitter.common.python-0.7.0. stdout:
running register
running egg_info
creating src/twitter.common.python.egg-info
writing requirements to src/twitter.common.python.egg-info/requires.txt
writing src/twitter.common.python.egg-info/PKG-INFO
writing namespace_packages to src/twitter.common.python.egg-info/namespace_packages.txt
writing top-level names to src/twitter.common.python.egg-info/top_level.txt
writing dependency_links to src/twitter.common.python.egg-info/dependency_links.txt
writing manifest file 'src/twitter.common.python.egg-info/SOURCES.txt'
reading manifest file 'src/twitter.common.python.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
writing manifest file 'src/twitter.common.python.egg-info/SOURCES.txt'
running check
Registering twitter.common.python to https://pypi.python.org/pypi
Server response (200): OK
running sdist
creating twitter.common.python-0.7.0
creating twitter.common.python-0.7.0/src
creating twitter.common.python-0.7.0/src/twitter
creating twitter.common.python-0.7.0/src/twitter.common.python.egg-info
creating twitter.common.python-0.7.0/src/twitter/common
creating twitter.common.python-0.7.0/src/twitter/common/python
creating twitter.common.python-0.7.0/src/twitter/common/python/http
making hard links in twitter.common.python-0.7.0...
hard linking MANIFEST.in -> twitter.common.python-0.7.0
hard linking setup.py -> twitter.common.python-0.7.0
hard linking src/twitter/__init__.py -> twitter.common.python-0.7.0/src/twitter
hard linking src/twitter.common.python.egg-info/PKG-INFO -> twitter.common.python-0.7.0/src/twitter.common.python.egg-info
hard linking src/twitter.common.python.egg-info/SOURCES.txt -> twitter.common.python-0.7.0/src/twitter.common.python.egg-info
hard linking src/twitter.common.python.egg-info/dependency_links.txt -> twitter.common.python-0.7.0/src/twitter.common.python.egg-info
hard linking src/twitter.common.python.egg-info/namespace_packages.txt -> twitter.common.python-0.7.0/src/twitter.common.python.egg-info
hard linking src/twitter.common.python.egg-info/requires.txt -> twitter.common.python-0.7.0/src/twitter.common.python.egg-info
hard linking src/twitter.common.python.egg-info/top_level.txt -> twitter.common.python-0.7.0/src/twitter.common.python.egg-info
hard linking src/twitter.common.python.egg-info/zip-safe -> twitter.common.python-0.7.0/src/twitter.common.python.egg-info
hard linking src/twitter/common/__init__.py -> twitter.common.python-0.7.0/src/twitter/common
hard linking src/twitter/common/python/__init__.py -> twitter.common.python-0.7.0/src/twitter/common/python
hard linking src/twitter/common/python/base.py -> twitter.common.python-0.7.0/src/twitter/common/python
hard linking src/twitter/common/python/common.py -> twitter.common.python-0.7.0/src/twitter/common/python
hard linking src/twitter/common/python/compatibility.py -> twitter.common.python-0.7.0/src/twitter/common/python
hard linking src/twitter/common/python/environment.py -> twitter.common.python-0.7.0/src/twitter/common/python
hard linking src/twitter/common/python/fetcher.py -> twitter.common.python-0.7.0/src/twitter/common/python
hard linking src/twitter/common/python/finders.py -> twitter.common.python-0.7.0/src/twitter/common/python
hard linking src/twitter/common/python/installer.py -> twitter.common.python-0.7.0/src/twitter/common/python
hard linking src/twitter/common/python/interpreter.py -> twitter.common.python-0.7.0/src/twitter/common/python
hard linking src/twitter/common/python/marshaller.py -> twitter.common.python-0.7.0/src/twitter/common/python
hard linking src/twitter/common/python/obtainer.py -> twitter.common.python-0.7.0/src/twitter/common/python
hard linking src/twitter/common/python/orderedset.py -> twitter.common.python-0.7.0/src/twitter/common/python
hard linking src/twitter/common/python/package.py -> twitter.common.python-0.7.0/src/twitter/common/python
hard linking src/twitter/common/python/pep425.py -> twitter.common.python-0.7.0/src/twitter/common/python
hard linking src/twitter/common/python/pex.py -> twitter.common.python-0.7.0/src/twitter/common/python
hard linking src/twitter/common/python/pex_bootstrapper.py -> twitter.common.python-0.7.0/src/twitter/common/python
hard linking src/twitter/common/python/pex_builder.py -> twitter.common.python-0.7.0/src/twitter/common/python
hard linking src/twitter/common/python/pex_info.py -> twitter.common.python-0.7.0/src/twitter/common/python
hard linking src/twitter/common/python/platforms.py -> twitter.common.python-0.7.0/src/twitter/common/python
hard linking src/twitter/common/python/resolver.py -> twitter.common.python-0.7.0/src/twitter/common/python
hard linking src/twitter/common/python/testing.py -> twitter.common.python-0.7.0/src/twitter/common/python
hard linking src/twitter/common/python/tracer.py -> twitter.common.python-0.7.0/src/twitter/common/python
hard linking src/twitter/common/python/translator.py -> twitter.common.python-0.7.0/src/twitter/common/python
hard linking src/twitter/common/python/util.py -> twitter.common.python-0.7.0/src/twitter/common/python
hard linking src/twitter/common/python/http/__init__.py -> twitter.common.python-0.7.0/src/twitter/common/python/http
hard linking src/twitter/common/python/http/crawler.py -> twitter.common.python-0.7.0/src/twitter/common/python/http
hard linking src/twitter/common/python/http/http.py -> twitter.common.python-0.7.0/src/twitter/common/python/http
hard linking src/twitter/common/python/http/link.py -> twitter.common.python-0.7.0/src/twitter/common/python/http
hard linking src/twitter/common/python/http/tracer.py -> twitter.common.python-0.7.0/src/twitter/common/python/http
Writing twitter.common.python-0.7.0/setup.cfg
creating dist
Creating tar archive
removing 'twitter.common.python-0.7.0' (and everything under it)
running upload
Submitting dist/twitter.common.python-0.7.0.tar.gz to https://pypi.python.org/pypi

**** Failed to install twitter.common.python-0.7.0. stderr:
warning: check: missing meta-data: either (author and author_email) or (maintainer and maintainer_email) must be supplied

warning: sdist: standard file not found: should have one of README, README.rst, README.txt

Upload failed (400): A file named "twitter.common.python-0.7.0.tar.gz" already exists for  twitter.common.python-0.7.0. To fix problems with that file you should create a new release.
error: Upload failed (400): A file named "twitter.common.python-0.7.0.tar.gz" already exists for  twitter.common.python-0.7.0. To fix problems with that file you should create a new release.

we should clean this up.