message: Remove rustc-serialize from README
diff: @@ -188,7 +188,7 @@ types. The driver currently supports the following conversions:
  </tr>
  <tr>
  <td>
  - <a href="https://github.com/rust-lang-nursery/rustc-serialize">serialize::json::Json</a>
  + postgres::types::Json
  and
  <a href="https://github.com/serde-rs/json">serde_json::Value</a>
  (<a href="#optional-features">optional</a>)
  @@ -313,10 +313,10 @@ implementations for `uuid`'s `Uuid` type. Requires `uuid` version 0.5.
  ### JSON/JSONB types
  [JSON and JSONB](http://www.postgresql.org/docs/9.4/static/datatype-json.html)
  -support is provided optionally by the `with-rustc-serialize` feature, which adds
  -`ToSql` and `FromSql` implementations for `rustc-serialize`'s `Json` type, and
  -the `with-serde_json` feature, which adds implementations for `serde_json`'s
  -`Value` type. Requires `serde_json` version 1.0, `rustc-serialize` version 0.3.
  +support is provided optionally by the `with-serde_json-1` feature, which adds
  +`ToSql` and `FromSql` implementations for `serde_json`'s `Value` type,
  +as well as adding a generic `Json<T>` type with those same implementations.
  +Requires `serde_json` version 1.0.
  ### TIMESTAMP/TIMESTAMPTZ/DATE/TIME types
  