stdlib/pattern: Rendered Pattern compatible with all Text representations instead of just String.

Signed-off-by: Lucas Bajolet <r4pass@hotmail.com>
stdlib/streams: Streamable now working on any Text type instead of just String.

Signed-off-by: Lucas Bajolet <r4pass@hotmail.com>
Merge: Streamable and Pattern update

Upgrade on Streamable and Pattern, they will now work with any kind of Text instead of just String.

Pull-Request: #373
Reviewed-by: Jean Privat <jean@pryen.org>
Reviewed-by: Alexis Laferrière <alexis.laf@xymus.net>