Add Links, _createlinkto, _linkvariable, _link!
Add _createlinkswith / undirected links!
Add link updates!
Add _createlinkwith and nobody test!
Add _other!
Make link creation take a command block!
Add link death!
Add _createlinksto!
Add _createlinksfrom!
Make clearall kill links!
Add _linkneighbors!
Add link-neightbor tests!
Add more tests for link neighbors!
Make turtle death cause link death!
Add a whole lot more tests!
Add both-ends!
Add other-end!
Add _islink!
Add _inlinkfrom, _outlinto, _linkwith!
Add _inlinkneighbors, _outlinkneighbors!