I think the development of this feature is not that acitve:
"This is taking more time then I thought. However, I am working on other projects as well."
You can also see that joseph is not working actively on this project. For more information you can have a look at his code here:
https://github.com/joseph-oc/cogo?source=cHere is another talk about some GIS stuff
http://forum.librecad.org/Using-LibreCAD-s-tools-on-GIS-vector-layers-td5707930.html#a5707933