somehow i knew you would get stuck on that last bit.
there's still the 2 previous points:
1) the developer admits that the software is not fully developed
2) the developer left an announcement on their web page that they would continue working on it in may 2014.
since they never removed that announcement, it implies that development came to a standstill long before may 2014.
there is, however, a new branch here:
https://github.com/xybu/onedrive-d
but alas, again it says: "still under active development and the program is not yet usable".