distutils scripts -- correct order of operations

[AaronAsAChimp]

So 'from ... import' lines are correctly recognized. The following example from pylint was not being correctly parsed:

#![...]/bin/python
from pylint import run_pylint
run_pylint()

[jimfulton]

Thanks for the PR!

Someone will need to write a test before this can be merged.

[reinout]

The fix (for my original mistake :-) ) looks good.

I've pulled the branch into my clone so that travis can check it.
https://travis-ci.org/reinout/buildout/builds/8999768
3 out of 4 are OK. The python 3.2 one isn't, but that looks like an unrelated anomaly (a number of logging handlers that is 1 off or so).

I'm seeing the same problem with docutils' scripts, so the fix is very welcome.