see https://github.com/nsf/termbox-go/commit/58d4fcbce2a7e6a3a48afbc6b7ec2a916ac33ee0
go-runewidth
Provides functions to get fixed width of the character or string.
Usage
runewidth.StringWidth("つのだ☆HIRO") == 12
Author
Yasuhiro Matsumoto
License
under the MIT License: http://mattn.mit-license.org/2013

