CardDAV Support

Excuse me if this is obvious but I am not a programmer!

I see old mails saying that work was done by Cyrus on CardDav, and this would be useful to allow an OSX machine running Mulberry 
to access contacts stored in Google Contacts (<http://gmailblog.blogspot.co.uk/2012/09/a-new-way-to-sync-google-contacts.html>).

I can see from the Wiki (<http://trac.mulberrymail.com/mulberry/wiki/opensource>) that it exists in the source code of the 4.1 
branch so I thought I'd give it a go...

<http://trac.mulberrymail.com/mulberry/wiki/opensource> shows you the OSX code instructions but the link to the Makefile isn't 
there (<http://svn.mulberrymail.com/mulberry/Mulberry/trunk/Makefile-MacOS>). No problem because if you dig around you see it 
lives at Makefile-MacOS

So you then download XCode 6.1 which contains the Apple Developer tools (after signing up as a developer). So run the make and 
the libraries are grabbed but then it all falls over trying to find

<http://developer.apple.com/samplecode/MoreFiles/MoreFiles.zip> and 
<http://developer.apple.com/samplecode/MoreFiles/MoreFilesX.zip>

Rummaging around in Google or on the develoepr.apple.com web site doesn't throw up anything that seems useful.

Can anyone provide clue?
Anyone already trodden down this path that wants to share suggestions offline?

Raza