ACT tree new files

[Robert Dewar]

it's fine to prepare the patch, and perhaps it will be helpful, but Geert
has not even had a chance to look at this patch, since he is away for a
few days, and all I am asking is please don't rush to apply this patch
without coordination with geert, since I am worried that it may make
things harder. Perhaps I am wrong, but there is absolutely no day-to-day
urgency here, so let's wait a few days till Geert can coordinate withy
you on this.