Return console character width

[nicolas-grekas]

To ease with writing console apps that prints variable width characters (0, 1 or 2 columns). But is it in the scope of this lib?

• https://github.com/hoaproject/String/issues/8
• http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
• http://stackoverflow.com/questions/3634627/how-to-know-the-preferred-display-width-in-columns-of-unicode-characters

[nicolas-grekas]

See https://github.com/hoaproject/String/pull/18

[nicolas-grekas]

Closed via 5d66d04