Add a "ci" feature to make clippy ignore docs warnings

plume-cli/Cargo.toml

@@ -23,3 +23,4 @@ path = "../plume-models"
 [features]
 postgres = ["plume-models/postgres", "diesel/postgres"]
 sqlite = ["plume-models/sqlite", "diesel/sqlite"]
+ci = ["plume-models/ci"]

plume-cli/src/main.rs

@@ -1,7 +1,8 @@
-use dotenv;
+#![cfg_attr(not(feature = "ci"), warn(missing_docs))]
 
 use clap::App;
 use diesel::Connection;
+use dotenv;
 use plume_models::{instance::Instance, Connection as Conn, CONFIG};
 use std::io::{self, prelude::*};