Namespaced vars

Now allows namespaces on query vars. e.g:

[:find ?user/data :where [?x :a :user] [?x :data ?user/data]]

2023 bugfix

Cleaned up delete and release, along with several ClojureScript errors that had crept in.

Flexinodes

Allows entity nodes to include URIs and UUIDs as well as Internal nodes and keywords.

Reference IDs

Updates transactions to handle ref IDs much better. Removes the OSP indexes.