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

plume-front/Cargo.toml

@@ -13,3 +13,6 @@ gettext-utils = { git = "https://github.com/Plume-org/gettext-macros/", rev = "a
 lazy_static = "1.3"
 serde = "1.0"
 serde_json = "1.0"
+
+[features]
+ci = []

plume-front/src/main.rs

@@ -1,6 +1,6 @@
 #![recursion_limit = "128"]
 #![feature(decl_macro, proc_macro_hygiene, try_trait)]
-#![warn(missing_docs)]
+#![cfg_attr(not(feature = "ci"), warn(missing_docs))]
 
 #[macro_use]
 extern crate gettext_macros;