rebuilder gives the wrong output for opencolorio: ``` ./target/release/rebuilder opencolorio opencolorio openimageio blender krita openshadinglanguage gmic ``` Our graph looks as following and looks correct but has one issue, where is krita-plugin-gmic?  Second issue, we use BFS for walking through the graph, but that does not give the right graph output for rebuilding, @felixonmars's [tool](https://raw.githubusercontent.com/felixonmars/archlinux-futils/master/genrebuild) reports the right order and uses a topological_sort. ``` $ ./genrebuild -e opencolorio opencolorio krita krita-plugin-gmic openimageio openshadinglanguage blender ```