GitLab

- Reintegrated the other-tags branch into my staging branch.  Local edits were required to integrate with the changes from the event-api branch.

Converted indexing to std::size_t, and fixed the Node templated overloads to properly index any index type (determining what is an index type is a bit of a hack - it should be is_convertible<T, std::size_t> (I think), but I just explicitly wrote down a list)