Remote nodes' values are Buffers

Consider the following code:

log.on('add', function (node) {
  console.log(node.value)
})

If the node was inserted locally, node.value will be the literal object that was added. If it was inserted and received remotely via replication, it will be a Buffer object that needs to be converted to a string and JSON.parse()d.

The encoding of the node's value ought to be consistent regardless of where it came from. I think we'll break somebody's code either way, so I'd be happier seeing it default to the former (raw value, not a buffer).

Start by tracing the log.on('add') event and comparing how node.value is produced for locally inserted versus remotely replicated nodes. Confirm the desired representation from the issue, then add or update coverage for both paths so the value has the same raw-object form regardless of origin.