Support using it as library? (PyPi package seems broken)

[Jeshan Giovanni BABOOA]

I'm trying to call cfripper from a Python script and looks like that can't be done yet.
I installed cfripper from PyPI and it doesn't seem to have all the necessary files, e.g The rule_processor.py script is missing. So we can't use the RuleProcessor class yet unless we are using the lambda package and not the PyPI one. See screenshot.

I think it's because the package isn't recursively copying all files as the directories, i.e config, model and rules are missing.

[Jeshan Giovanni BABOOA]

I found a fix in the meantime, submitting PR #25.

Before, a code like this wouldn't work:

from cfripper.model.rule_processor import RuleProcessor

Now it does.