Adds existence invariants to Honu to allow for "Create" and "Update" semantics with already exists or not found errors on Put as well as on Delete, though these semantics are a bit more questionable in that case.
Changelog
Full Changelog: v0.3...v0.4.0
About
Honu is (currently) an experimental project that adds global versioning and
replication semantics to an embedded database such as leveldb. If you're interested
in this project, please see https://geodistributed.systems for more.