add zenith_utils crate

This is a place for code that's shared between other crates in this
repository.

Cargo.lock

@@ -2678,3 +2678,7 @@ dependencies = [
  "postgres_ffi",
  "walkeeper",
 ]
+
+[[package]]
+name = "zenith_utils"
+version = "0.1.0"

Cargo.toml

@@ -6,4 +6,5 @@ members = [
     "zenith",
     "control_plane",
     "postgres_ffi",
+    "zenith_utils",
 ]

zenith_utils/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "zenith_utils"
+version = "0.1.0"
+authors = ["Eric Seppanen <eric@zenith.tech>"]
+edition = "2018"
+
+[dependencies]

zenith_utils/src/lib.rs

@@ -0,0 +1,3 @@
+//! zenith_utils is intended to be a place to put code that is shared
+//! between other crates in this repository.
+