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.
True, Flake8 complains, too. @crm416 @shbhrsaha Will we adhere to PEP008 in this matter?