Merge pull request #913 from alexcrichton/release

Prep for the 1.20.0 release

Author: alexcrichton

_config.yml

@@ -1,18 +1,18 @@
 name: The Rust Programming Language
-stable: "1.19.0"
-stable_date: "2017-07-20"
-stable_blog: "https://blog.rust-lang.org/2017/07/20/Rust-1.19.html"
-stable_full_version: "rustc 1.19.0 (0ade33941 2017-07-17)"
-beta: "1.20"
-beta_date: "2017-08-31"
-nightly: "1.21"
+stable: "1.20.0"
+stable_date: "2017-08-31"
+stable_blog: "https://blog.rust-lang.org/2017/08/31/Rust-1.20.html"
+stable_full_version: "rustc 1.20.0 (f3d6973f4 2017-08-27)"
+beta: "1.21"
+beta_date: "2017-10-12"
+nightly: "1.22"
 channels:
   - name: "stable"
-    vers: "1.19.0"
-    package: "1.19.0"
+    vers: "1.20.0"
+    package: "1.20.0"
   - name: "beta"
-    vers: "1.20"
+    vers: "1.21"
     package: "beta"
   - name: "nightly"
-    vers: "1.21"
+    vers: "1.22"
     package: "nightly"