chinese font error with image labeled "x"

[waleson]

example "twopoint" ,after changed the yaxies label to chinese ,the output.png seem abnormal with font "x",

like https://github.com/wcharczuk/go-chart/issues/50 so , maybe we should add some example about setting font.

I don't know how to change the "font.go" file .

and i dont know whether the font support Font-awesome ? who can tell me ,thank you

[ghj1976]

example： https://www.cnblogs.com/ghj1976/p/11356025.html