Still does not find correct Python/virtualenv

Hi,

So I (still) have this problem with atom-script not working with my virtualenv.

I have a virtualenv with a few packages and Python 3:

```
% python --version
Python 3.3.4
```

I then start atom using `atom .` from that same shell. But when calling atom-script on a .py file it uses the system Python version: `import sys; print(sys.version)` outputs `2.7.10`.

My system: OSX 10.11.2, Atom 1.3.1, atom-script 3.2.0, fish shell. I had the same problem when using zsh.

Any hints how to debug this?