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.
From [PEP8](http://legacy.python.org/dev/peps/pep-0008/)
> Separate top-level function and class definitions with two blank lines.