libtock-c has a long and organic history, resulting in an
inconsistent API. Pull request #370 is a large-scale
rewrite which creates standards for libtock-c and conforms
the existing library.

As this is a large API churn, and there is a long gap since
the last formal release, we have tagged the final commit
prior to merging the updated API, here.

github.com/tock/libtock-c/pull/370