Add directory semantics to zk, make magic prefix configurable.
Make default paths externally accessible. Add IsDirectory() function.
Extract zkns pdns adapter code and fix a number of small bugs. Improve test clarity.
List cells when listing the root directory.
Improve CNAME resolution. Improve SRV record randomization.
Add support for weightless round-robin A records.
Add a distributed lock primitive that handles complex edge cases.
Simplify DNS SRV record shuffling.
Add election support methods.
Add comments.
Merge pull request #42 from msolo/zk-name-service

Zk name service