Support editable installation

[voidpp]

pip help:

Install a project in editable mode (i.e. setuptools "develop mode") from a local project path or a VCS url.

As I see, this is not possible now with the virtualenv-api.
I tried env.install("-e /path/to/module"), but it raised an exception.

(virtualenv-api==2.1.9)

BTW this package is pretty cool :)

[sjkingo]

Thanks for picking this up. Version 2.1.10 is now available on pypi which fixes this.

>>> env.install('-e git+https://github.com/stephenmcd/cartridge.git')

(or any other valid URL/path)

[voidpp]

Wow, thx for the quick response and release.