Terminal hyperlinks support

[chubin]

Terminal hyperlinks, that use the following notation:

echo -e '\e]8;;http://example.com\e\\This is a link\e]8;;\e\\'

(more on this here: https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda )
are currently not supported (i.e. the whole string, including the hyperlink
is considered to be visible, what is generally speaking wrong; because
even the terminals that do not support hyperlinks show only the visible part of the link, the link caption).

Example:

$ # correct
$ python -c 'import ansiwrap; print ansiwrap.fill("This is a link. "*10); '
This is a link. This is a link. This is a link. This is a link. This
is a link. This is a link. This is a link. This is a link. This is a
link. This is a link.

$ # wrong
$ python -c 'import ansiwrap; print ansiwrap.fill("\x1B]8;;http://example.com\x1B\\This is a link\x1B]8;;\x1B\\. "*10); '
This is a link.
This is a link.
This is a link.
This is a link.
This is a link.
This is a link.
This is a link.
This is a link.
This is a link.
This is a link.