Add clippy lints and add rustfmt and clippy to CI.

.rustfmt.toml

@@ -1 +0,0 @@
-merge_imports = true

.travis.yml

@@ -1,4 +1,12 @@
 language: "rust"
+before_script:
+  - "rustup component add rustfmt"
+  - "rustup component add clippy"
+script:
+  - "cargo fmt --all -- --check"
+  - "cargo clippy -- -D warnings"
+  - "cargo build --verbose"
+  - "cargo test --verbose"
 notifications:
   email: false
   irc:

src/lib.rs

@@ -8,8 +8,32 @@
 //! input parameters for requests, and the structure of a successful response.
 //! Such types can then be used by client code to make requests, and by server code to fulfill
 //! those requests.
-#![deny(missing_debug_implementations)]
+
-#![deny(missing_docs)]
+#![deny(
+    missing_copy_implementations,
+    missing_debug_implementations,
+    missing_docs,
+    warnings
+)]
+#![warn(
+    clippy::empty_line_after_outer_attr,
+    clippy::expl_impl_clone_on_copy,
+    clippy::if_not_else,
+    clippy::items_after_statements,
+    clippy::match_same_arms,
+    clippy::mem_forget,
+    clippy::missing_docs_in_private_items,
+    clippy::multiple_inherent_impl,
+    clippy::mut_mut,
+    clippy::needless_borrow,
+    clippy::needless_continue,
+    clippy::single_match_else,
+    clippy::unicode_not_nfc,
+    clippy::use_self,
+    clippy::used_underscore_binding,
+    clippy::wrong_pub_self_convention,
+    clippy::wrong_self_convention
+)]
 
 use std::{convert::TryInto, io};