Modules installer

This is a simple modules installer (can't handle multiple files, or requirements yet)

It connects to http://jaspermoduleshub.herokuapp.com/

I added a `walk_packages` on `brain.py` so that modules can be installed in subfolders.
This is bad style anyway. We shouldn't map these methods to a dict, especially not in every single __init__ call. And why is it in capital case?