Added icon

Source for Caudec icon: http://caudec.net/img/caudec-1600x1600.png

Source for droplet plate: Exported standard icon from Platypus as icns, converted the 128px one to png, then removed the animal with Photoshop.

Then merged and exported as png using Photoshop.
Revert "Added icon"

This reverts commit 26f554b70ae24b34d70938d5e1f0ee2305ba1580.
Added icon

Source for Caudec icon: http://caudec.net/img/caudec-1600x1600.png

Source for droplet plate: Exported standard icon from Platypus as icns, converted the 128px one to png, then removed the animal with Photoshop.

Then merged and exported as png using Photoshop.

Signed-off-by: Günther Eberl <guenther@eberl.se>