b838651ac9
Better error when deriving Deserialize for struct containing &str Fixes #360. The error looks like this: ```rust #[derive(Serialize, Deserialize)] struct Test<'a> { s: &'a str, } ``` ``` src/main.rs:6:5: 6:15 error: Serde does not support deserializing fields of type &str; consider using String instead src/main.rs:6 s: &'a str, ^~~~~~~~~~ ```