bitwiser73

Fix gfm highlighting with _ and __ (see #96 and #61)

6

This is a fix for gfm handling of _ (italic) and __ (bold), see #96 and #61 Here's my test file before and after:   It would be simpler...

Some monospace characters are not rendering as proper monospace

3

### Summary Basically, for monospace font, the asian characters width should be equal to two of ascii's. When using the same font (Ubuntu Mono Regular), it works on gnome-terminal but...