Adds an empty folder to hold virtualenvs.
Adds an empty folder to hold virtualenvs.

This can be used for virtualenvs.

    $ virtualenv -p python2.7 venv/2.7/
    $ virtualenv -p python3.3 venv/3.3/

Signed-off-by: Markus Hubig <1530596661b504c08a18435b39f5ffa8d6f49ebb@gmail.com>

mhubig/implib2,mhubig/implib2