Macにvirtualenv-pyenvをインストール

http://qiita.com/maosanhioro/items/47a52f96fefba7126f9b

$ brew install pyenv-virtualenv

#To enable shims and autocompletion add to your profile:
#  if which pyenv > /dev/null; then eval "$(pyenv init -)"; fi

#To use Homebrew's directories rather than ~/.pyenv add to your profile:
#  export PYENV_ROOT=/usr/local/opt/pyenv

#To enable auto-activation add to your profile:
# if which pyenv-virtualenv-init > /dev/null; then eval "$(pyenv virtualenv-init -)"; fi

よく分かってないので設定しなかった．