Clarify 1.3 is a living subset (non-experimental) of the full protocol. (#235)

Author: paulirish

Diff for: pages/1-3.md

@@ -3,5 +3,5 @@ layout: shell.hbs
 title: Chrome DevTools Protocol - stable (1.3)
 version: 1-3
 ---
-The **1.3 version of the protocol** is the  stable RC release of the protocol, tagged at Chrome 64.
-It includes a smaller subset of the complete protocol compatibilities.
+The **1.3 version of the protocol** is the "living" stable channel of the protocol. 
+It's a subset of the complete protocol, [excluding](https://github.com/ChromeDevTools/debugger-protocol-viewer/blob/d84a0457b8d5b6c4a7a2947572b83239d8fb5954/make-stable-protocol.js) items that are experimental or deprecated.