Comment (by Zach Etienne):

Issue 4: doc/cactus.sty should be removed. I understand that this is a convenient location for the file when running e.g., pdflatex documentation.tex from within the doc directory, but this file already exists in the Toolkit in a standard place that is looked at when e.g., make AllDoc is run. It's best that this remains the situation in case we'd like to update the style file.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2549/inlcude-flrwsolver-in-et