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.
Please use either `"%s: %s" % (self.message, self.module)` or `"{message}: {module}".format(message=self.message, module=self.module)` syntax.