Do not use distribute_setup.use_setuptools to install distribute any time setup.py is run.
tls.c and tls.io are nice too I suppose, include them
Take advantage of the cffi extension module caching features
Update cffi dependency to 0.6

Update depedency requirement to latest cffi release.
Don't use PyPI mirrors when installing packages

The implementation of a content delivery network (CDN) for PyPI has
significantly improved PyPI's performance. It is now faster and more
reliable to use the CDB and PyPI's mirrors.
Merge pull request #14 from exarkun/dont-install-setuptools

Drop distribute_setup.py and its use
Merge pull request #15 from exarkun/working-dist

Fix distribution files
merge master