Add scalable Gajim icon
I vectorized the attache gajim.svg from the bitmap. Please use this vectorized version of the icon where applicable.
I did this because when using gnome-do with docky, the Gajim icon that is used right now doesn't look pretty. Most others applications seem to have an SVG icon too. See screenshot where the bitmap is used.
Please add it, it took me the whole day to do this (not an artist).. :)