Cloning an existing unit and changing its value is a fair bit faster.

Since the character creator now produces a builder object with things
like the name included, we no longer need to have a duplicate copy of
the character's name (it was needed because the name lived inside the
anonymous function, and thus wasn't accessible).

Now that we're self-hosted, we can have all the smut we want!

Entities now have their templates cloned (by serializing and parsing) to allow for
a single object to be passed in repeatedly.