The difference is a couple of Netbeans folders that marks it as Free Form, nothing else changed. I'm not changing the structure of the project at all. See diff for details.
The only change is deleting the nbproject folder.
Also you need to clear you IDE's user dir as for some reason it tries to open as a free form project even when it is not any more. See related issue: http://netbeans.org/bugzilla/show_bug.cgi?id=221582
Patch already available on