docs: Fix broken reference to pip development docs
ignore system installed pip/setuptools
Merge pull request #523 from qwcode/ignore_system

ignore system installed pip/setuptools
Upgrade setuptools to 2.1.0
Merge pull request #533 from pypa/upgrade-setuptools

Upgrade setuptools to 2.1.0
Add a changelog
bump version
mention --always-copy fix in change log
Merge pull request #517 from xen0n/fix-devel-doc-link

docs: Fix broken reference to pip development docs
Properly delete __PYVENV_LAUNCHER__ from the environment
Merge pull request #541 from pypa/fix-pyvenv-launcher

Properly delete __PYVENV_LAUNCHER__ from the environment
Don't swallow failures when executing pip
Merge pull request #542 from pypa/dont-swallow-failures

Don't swallow failures when executing pip
Switch running tests over to tox
Merge pull request #543 from pypa/switch-to-tox

Switch running tests over to tox
Build Python 3.4
Merge pull request #545 from pypa/python34

Build Python 3.4
Copy the _bootlocale module for Python 3.4

Special thanks to @haypo for helping me figure this out!
Merge pull request #546 from pypa/work-on-py34

Copy the _bootlocale module for Python 3.4
Upgrade pip to 1.5.1rc1