Adds a new path to the list of searchable paths

        :param path: new path

def add_path(self, path):
        """ Adds a new path to the list of searchable paths

        :param path: new path
        """

        if os.path.exists(path):
            self.paths.add(path)
            return path
        else:
            #logger.debug('Path {} doesn\'t exist'.format(path))
            return None