Write an example for using ScalaClient.default

[blast-hardcheese]

Spun out of #193, it seems as though the expected functionality regarding defaults(...) didn't produce the same result as not using defaults.

If it turns out that defaults doesn't work, this should be fixed, as well as consolidated into something that isn't ScalaClient.defaults(...)/ScalaServer.defaults(...), since that gives the impression that the kind is actually taken into account with defaults (which isn't actually the case).