Your contribution cannot be approved because it does not relate to a valid open-source project. See here for a definition of "open-source."
The repository contains only image files, not even the source files (.psd, .ai, etc.) and GitHub might be the wrong platform to manage this project after all.
Dropbox for example keeps a version history of files like .psd. Git/GitHub on the other hand, can't do that because it's meant to be used only with text files.
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