Deny all the warnings when building.

hammond-data/src/lib.rs

@@ -10,17 +10,18 @@
     )
 )]
 #![allow(unknown_lints)]
-#![deny(
+#![warn(
     bad_style, const_err, dead_code, improper_ctypes, legacy_directory_ownership,
     non_shorthand_field_patterns, no_mangle_generic_items, overflowing_literals, path_statements,
     patterns_in_fns_without_body, plugin_as_library, private_in_public, private_no_mangle_fns,
     private_no_mangle_statics, safe_extern_statics, unconditional_recursion,
     unions_with_drop_fields, unused_allocation, unused_comparisons, unused_parens, while_true
 )]
-#![deny(missing_debug_implementations, missing_docs, trivial_casts, trivial_numeric_casts)]
-#![deny(unused_extern_crates, unused)]
-
-// #![feature(conservative_impl_trait)]
+#![warn(
+    missing_debug_implementations, missing_docs, trivial_casts, trivial_numeric_casts,
+    unused_extern_crates, unused
+)]
+#![deny(warnings)]
 
 //! FIXME: Docs
 

hammond-downloader/src/lib.rs

@@ -1,7 +1,8 @@
 #![recursion_limit = "1024"]
-#![deny(unused_extern_crates, unused)]
+#![warn(unused_extern_crates, unused)]
 #![allow(unknown_lints)]
 #![cfg_attr(feature = "cargo-clippy", allow(blacklisted_name, option_map_unit_fn))]
+#![deny(warnings)]
 
 extern crate failure;
 #[macro_use]

hammond-gtk/src/main.rs

@@ -3,7 +3,8 @@
     allow(clone_on_ref_ptr, blacklisted_name, match_same_arms, option_map_unit_fn)
 )]
 #![allow(unknown_lints)]
-#![deny(unused_extern_crates, unused)]
+#![warn(unused_extern_crates, unused)]
+#![deny(warnings)]
 
 extern crate gdk;
 extern crate gdk_pixbuf;