Implement mkproject command/script

[khorn]

virtualenvwrapper implements a mkproject command which creates a project dir, creates an environment variable, and connects them with it's equivalent of setproject.

This is a nice shortcut, and virtualenvwrapper-win should have it.

[utek]

Does it also creates virtualenv? It would be nice if you could write what current command mkproject is equivalent for. Thx.

[amullins83]

@utek Yes, the virtualenvwrapper command creates a project directory and a virtualenv with the same name, and sets the new project folder as the active project for that new virtualenv. It's made fairly clear in the virtualenvwrapper tutorial here: http://virtualenvwrapper.readthedocs.io/en/latest/command_ref.html#project-directory-management