v0.4.0

• PROPERTY_DB now also takes a redis://host[:port][/key-prefix] DSN, which
  builds core 0.3's RedisCorpus. Until now that class existed and no suite
  could reach it: the engine reads no environment by design, and this adapter
  hardcoded the filesystem corpus. A directory keeps meaning exactly what it
  meant. ext-redis is preferred when loaded, predis/predis otherwise, and
  neither installed is an error rather than a silent fall back to the
  filesystem. Same variable, same messages as the Testo adapter.