To save space (and not commit large binary files to the repository), icons are not stored in this repository.
The full icon set (all sizes required for building) can be downloaded by running the "install.sh" script in this directory.
If you are interested in editing the icon, the source file is available:
https://d2p12wh0p3fo1n.cloudfront.net/files/20120408/Icon.pxm (6.9M, Pixelmator format)
Available under the Creative Commons BY-SA 3.0 license: https://creativecommons.org/licenses/by-sa/3.0/
See LICENSE in repository root for full license information and information about original source photographs.