Add a framebuffer implementation based on clutter instead of "raw"
OpenGL. The performance is slightly worse, but it might bring some
platform abstraction and other benefits for the future.
Origin commit data
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Branch: master
Commit: dd6921140d
Author: Stefan Seyfried <seife@tuxbox-git.slipkontur.de>
Date: 2016-10-30 (Sun, 30 Oct 2016)
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