Add Meta description for Twitter cards etc

[shibumi]

Hi,
would be nice if we could include a header for twitter cards and so on.

[shibumi]

Mh Ok, I've just realized that there is already twitter cards support via structured-data.html file. But why can't I see an image for my website in the twitter card? It's always just blank, although I've set enough icons in different sizes.

[shibumi]

closing this.. because I misunderstood twitter cards