Mark prnd module deprecated and schedule 0.6.0 release

Author: dhardy

CHANGELOG.md

@@ -9,7 +9,7 @@ A [separate changelog is kept for rand_core](rand_core/CHANGELOG.md).
 You may also find the [Upgrade Guide](https://rust-random.github.io/book/update.html) useful.
 
 
-## [0.6.0] - Unreleased
+## [0.6.0] - 2018-11-14
 
 ### Project organisation
 - Rand has moved from [rust-lang-nursery](https://github.com/rust-lang-nursery/rand)

src/lib.rs

@@ -102,6 +102,7 @@ pub use rand_core::{ErrorKind, Error};
 // Public modules
 pub mod distributions;
 pub mod prelude;
+#[deprecated(since="0.6.0")]
 pub mod prng;
 pub mod rngs;
 pub mod seq;