Include all files anywhere in the current directory that match the
        pattern. This is very inefficient on large file trees.

def global_include(self, pattern):
        """
        Include all files anywhere in the current directory that match the
        pattern. This is very inefficient on large file trees.
        """
        if self.allfiles is None:
            self.findall()
        match = translate_pattern(os.path.join('**', pattern))
        found = [f for f in self.allfiles if match.match(f)]
        self.extend(found)
        return bool(found)