Maybe most easy is to generate a diff between before and current state. (svn diff -r123:HEAD)
Since it just concerns the placing of the buildings, the standard code should work, even with extendend.
No changes related to multi-tiles have been incorporated yet. This is because what I've done so far (changes to networks and GUIs) isn't directly related to the multi-tile buildings code, but I'd like to look into the multi-tile buildings code. It would be very helpful if you could tell me which file to look at, when, the commit number, etc. If I could know the filename, I would be able to find out what to change from the diff.
According to my memorandum, these may be involved in commits that haven't been incorporated yet, but I'm not sure.
8749, 8783, 8792, 8794, 8905, 9163