[css-syntax] Update Changes list.

Author: tabatkins

css-syntax/Overview.bs

@@ -3424,6 +3424,10 @@ Changes from the 20 February 2014 Candidate Recommendation</h3>
 
 	* Change the definition of ident-like tokens to allow "--" to start an ident.
 
+	* Don't serialize the digit in an <<an+b>> when A is 1 or -1.
+
+	* Define all tokens to have a <a>representation</a>.
+
 	The following editorial changes were made:
 
 	* The "Consume a string token" algorithm was changed to allow calling it without specifying an explicit ending token,
@@ -3438,6 +3442,8 @@ Changes from the 20 February 2014 Candidate Recommendation</h3>
 
 	* Removed the Selectors-specific tokens, per WG resolution.
 
+	* Removed "code point" and "surrogate code point" in favor of the identical definitions in the Infra Standard.
+
 
 <h3 id="changes-WD-20131105">
 Changes from the 5 November 2013 Last Call Working Draft</h3>