Basic gravatar support

So, if there aer QAs and CRs, it will show the gravatar of the user
that did it.

TODO: hover tooltip with their name.
Make the table prettier.

But only marginally :/ It's still not to my liking, but we'll get
there some day.
Only show qa/cr in multiline if there are avatars

Else, show inline. Because it takes up a lot of space.

TODO: see if we can put photos inline as well. It might turn out okay.
Make things more responsive.

Especially the gravatar stuff. I'm picky I guess.
Give the QA/CR count less space

It's not like it was using it or anything.
Merge pull request #10 from freshvolk/whodunnit

Whodunnit