Decide which is the official repository

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@guicho271828 has moved issues from the TODO file to his repository:
https://github.com/guicho271828/lisp-interface-library/issues

Make sure all the issues are either tracked there (if it becomes the "official" repository), or here (by migrating them from there), or wherever the official repository ends up being.

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Note: the old TODO file is here:
git show c382bb6a889dcb674c68694a46c98a3313d8715b:TODO