mxcl/homebrew — pull request #20675 by yyuu (2013-06-22 02:17:18+00:00)
Title: Please add pyenv-virtualenv formula

The [pyenv-virtualenv](https://github.com/yyuu/pyenv-virtualenv) is a plugin for pyenv (existing formula). This plugin allow users to manage Python's virtualenv as a version of pyenv.