Release version 0.4 The most important change is the rename from "sb" to "gob". As such, all binaries now have a "gob-" prefix instead of a "sb-" prefix. Other than that, this is mostly a cleanup release, including initial documentation, improved tests and some minor cleanups. Furthermore, the block storage now has a version associated with it. This makes sure that gob will not try to write to block stores which have a different version, especially in the case of backwards-incompatible changes.