[arturadib]

It's a hack of course, but if the changes are really that occasional, the pain is negligible: all you need to do is to commit twice for every project change (once for a sub-directory containing the project repo, once for the root repo).

If a project becomes active again, simply take it out of the master repo and push it as a new repo.

It's really not that bad. But then again, things change if you have collaborators...