erning/bootstrap.py — pull request #1 by baijian (2014-04-26 16:30:28+00:00)
Title: update virtualenv install method

prior to version 1.9 virtualenv bundle setuptools and pip as support files with virtualenv. And the `virtualenv.py` script is not supported if run without the necessary pip/setuptools/virtualenv distributions avaiable locally.
So I download the whole virtualenv tarball and extract files, then use `virtualenv.py`, all become normal.