Add comic author's comic text

[Vidar Wahlberg]

For XKCD the "alt" (or mouseover) text is displayed alongside the comic.
Certain other comics, such as "Scandinavia and the World" and "Nerf Now" also got some descriptive text for the comic, it would be nice if this text also is displayed next to the comic.

[Stein Magnus Jodal]

• XKCD
• SATW
• Nerf Now (d016291)