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.
Well, most of these methods do not work anyway if they are not called from/after the `install` method, because there is no attribute `self.module_path`.

If these methods are not meant to be called directly. they should be marked with an underscore:
> Use one leading underscore only for non-public methods and instance variables.
-- [PEP 8](http://legacy.python.org/dev/peps/pep-0008/#method-names-and-instance-variables)