Update for 1.15

_config.yml

@@ -1,18 +1,18 @@
 name: The Rust Programming Language
-stable: "1.14.0"
-stable_date: "2016-12-22"
-stable_blog: "https://blog.rust-lang.org/2016/12/22/Rust-1.14.html"
-stable_full_version: "rustc 1.14.0 (2c6933acc 2016-11-07)"
-beta: "1.15"
-beta_date: "2017-02-02"
-nightly: "1.16"
+stable: "1.15.0"
+stable_date: "2017-02-02"
+stable_blog: "https://blog.rust-lang.org/2017/02/02/Rust-1.15.html"
+stable_full_version: "rustc 1.15.0 (10893a9a3 2017-01-19)"
+beta: "1.16"
+beta_date: "2017-03-16"
+nightly: "1.17"
 channels:
   - name: "stable"
-    vers: "1.14.0"
-    package: "1.14.0"
+    vers: "1.15.0"
+    package: "1.15.0"
   - name: "beta"
-    vers: "1.15"
+    vers: "1.16"
     package: "beta"
   - name: "nightly"
-    vers: "1.16"
+    vers: "1.17"
     package: "nightly"