get new high resolution icon

[pphaneuf]

No description provided.

[pphaneuf]

We'd need a high resolution icon. We had a new one contributed, I'm not
really thrilled by it, but most importantly, it's very low resolution
(64x64 or something like that?). We'd need something like 256x256 at least,
possibly something done with vector graphics, like SVG (we'd probably have
to render it into the various formats that we need, but we'd be
resolution-independent).

Rémi, you made the original icon, no? It was nice, couldn't you make a 2.0
version of it? :-)