Add support for Vary header
Added to .hgignore and fixed issue #65
Fixed issue #77
update changelog
Update release tags
Fix issue 91
Fix issue #62 by trentm
Fix for issue #94 by Leonard Richardson
Fix permissions on unused-header.asis
Clean up trailing whitespace.
Add a simple self-contained http smoke test.
Import socks.py for proxy support from http://code.google.com/p/socksipy-branch/
socks: clean up trailing whitespace
socks: many many pep8 fixes
tests: add simple functional test for proxies

Depends on tinyproxy - test will automatically skip if it is unavailable.
tests: add missing __init__.py
MANIFEST: update for python{2,3} directories
tests: misc pep8 cleanups
proxy support: degrade gracefully when socket.socket is unavailable

This should allow httplib2 to continue to work even on platforms like
appengine where the socket module exists but has no socket attribute.
Fixes issue 96.