Update READMEs regarding rand_derive

Author: dhardy

README.md

@@ -108,34 +108,6 @@ cargo bench
 cargo test --benches
 ```
 
-# `derive(Rand)`
-
-You can derive the `Rand` trait for your custom type via the `#[derive(Rand)]`
-directive. To use this first add this to your Cargo.toml:
-
-```toml
-rand = "0.4"
-rand_derive = "0.3"
-```
-
-Next in your crate:
-
-```rust
-extern crate rand;
-#[macro_use]
-extern crate rand_derive;
-
-#[derive(Rand, Debug)]
-struct MyStruct {
-    a: i32,
-    b: u32,
-}
-
-fn main() {
-    println!("{:?}", rand::random::<MyStruct>());
-}
-```
-
 
 # License
 

rand-derive/README.md

@@ -1,9 +1,12 @@
-
-rand_macros
+rand_derive
 ====
 
 `#[derive(Rand)]` functionality for the `rand::Rand` trait.
 
+**This module is deprecated as of rand 0.5**, due in part to breaking changes
+in rand and in part to lack of use. Code is preserved because in theory it
+should be straightforward to modify for use with rand's new distribution code.
+
 ## Usage
 Add this to your `Cargo.toml`: