added nightly feature

Kimundi · Kimundi · commit 7dab6d4195b5 · 2015-08-03T23:29:44.000+02:00
diff --git a/Cargo.toml b/Cargo.toml
@@ -10,3 +10,6 @@ documentation = "http://kimundi.github.io/lazy-static.rs/lazy_static/index.html"
 
 repository = "https://github.com/Kimundi/lazy-static.rs"
 keywords = ["macro", "lazy", "static"]
+
+[features]
+nightly = []
