docs(glossary): Fix ECMAScript description

closes #2030
ES2016(ES7) has already been officially published.

Author: trotyl

public/docs/ts/latest/glossary.jade

@@ -348,23 +348,17 @@ a#aot
     The [official JavaScript language specification](https://en.wikipedia.org/wiki/ECMAScript).
 
     The latest approved version of JavaScript is
-    [ECMAScript 2015](http://www.ecma-international.org/ecma-262/6.0/)
-    (AKA "ES2015" or "ES6") and many Angular 2 developers will write their applications
+    [ECMAScript 2016](http://www.ecma-international.org/ecma-262/7.0/)
+    (AKA "ES2016" or "ES7") and many Angular 2 developers will write their applications
     either in this version of the language or a dialect that strives to be
     compatible with it such as [TypeScript](#typesScript).
 
-    Most modern browsers today only support the prior "ECMAScript 5" (AKA ES5) standard.
-    Applications written in ES2015 or one of its dialects must be "[transpiled](#transpile)"
+    Most modern browsers today only support the much older "ECMAScript 5" (AKA ES5) standard.
+    Applications written in ES2016, ES2015 or one of their dialects must be "[transpiled](#transpile)"
     to ES5 JavaScript.
 
     Angular 2 developers may choose to write in ES5 directly.
-:marked
-  ## ECMAScript 2015
-.l-sub-section
-  :marked
-    The latest released version of JavaScript,
-    [ECMAScript 2015](http://www.ecma-international.org/ecma-262/6.0/)
-    (AKA "ES2015" or "ES6")
+
 :marked
   ## ES2015
 .l-sub-section