The pngs could be generated from inkascape in a loop, though for reason X
or Y, inkscape 0.91 refuse it.
The command to generate the icns is
iconutil -c icns -o ipynb.icns ipynb.iconset
- yes the folder have to be named icon.iconset, because apple
- yes the file icon_111x111@2x.png is the same than icon_222x222.png
but the @2x make a difference on retina screen, because apple
right now in **some conditions** the iconutils fails with out of memory.
we should try to pngcrush some images.
