v0.0.13

A small client-only release.

• retalk show now honors --dir like every other command. Directory-based identities no longer need the RETALK_HOME workaround: retalk show PEER --dir DIR, or --group NAME / --web with no positional at all. Giving both a USER positional and --dir is refused as ambiguous; the named-user form (retalk show alice bob) is unchanged. (#34)

No server changes; relays on 0.0.12 are fully compatible.