leigh-chain-pki: Sketched out PKI service. Fixes to directory store to handle mixed case names properly. Supported to-disk serialization.

leigh-chained: Changed geth variable to "rpc" given that there is more software this is compatible with than geth

leigh-stack-dnsd: v1.13 ad-blocking now returns nodata (empty) response instead of 127.0.0.1 for evil names