Update changes section, tweak wording around <<ident>> because it's generally subclassed, update DoC

Author: fantasai

css-values/Overview.bs

@@ -350,8 +350,8 @@ Property value examples</h3>
 <h2 id="textual-values">
 Textual Data Types</h2>
 
-	<dfn export lt="identifier|ident">Identifiers</dfn> are denoted by <dfn>&lt;ident></dfn>
-	and consist of a sequence of characters conforming to the <<ident-token>> grammar. [[!CSS3SYN]]
+	<dfn export lt="identifier|ident">Identifiers</dfn>, generically denoted by <dfn>&lt;ident></dfn>,
+	consist of a sequence of characters conforming to the <<ident-token>> grammar. [[!CSS3SYN]]
 	Identifiers cannot be quoted;
 	otherwise they would be interpreted as strings.
 
@@ -2224,8 +2224,13 @@ Changes</h2>
 	<ul>
 		<li>Allow zero angles to be represented as ''0''.
 		    (Change due to Web-compatibility constraints in transform and gradient syntaxes.)
+		<li>Defined <a href="#local-urls">special handling</a> for fragment URLs.
 		<li>Defined an empty <<url>> resolves to an invalid resource.
-
+		<li>Defined <a href="#calc-serialize">serialization of <css>calc()</css> values</a>.
+		<li>Added definition of <<ident>> to definition of <a>identifiers</a>.
+		<li>Added <<length-percentage>> as a shorthand for <<length>> | <<percentage>>,
+			along with equivalent productions for angles, numbers, times, and frequencies.
+		<li>Various clarifications and editorial improvements.
 	</ul>
 
 	Changes since the <a href="https://www.w3.org/TR/2013/CR-css3-values-20130730/">30 July 2013 Candidate Recommendation</a> are:

css-values/issues-cr-2015.bsi

@@ -76,8 +76,6 @@ Resolved: Editorial
 Issue 9.
 Summary:  Allow dimensionless zero to parse as angle.
 From:     CSSWG
-Comment:
-Response:
 Closed:   Accepted
 Verified:
 Resolved: Sydney 2016 F2F
@@ -135,9 +133,9 @@ Issue 16.
 Summary:  Fallback value for ch in text-orientation:upright
 From:     Florian Rivoal
 Comment:  https://lists.w3.org/Archives/Public/www-style/2016Mar/0078.html
-Response:
+Response: https://lists.w3.org/Archives/Public/www-style/2016Mar/0158.html
 Closed:   Accepted
-Resolved: =WG= discuss/resolve
+Resolved: Editors' discretion
 ----
 Issue 17.
 Summary:  How units/expressions are resolved in specified style
@@ -169,3 +167,10 @@ From:     Simon Pieters
 Comment:  https://lists.w3.org/Archives/Public/www-style/2016Apr/0067.html
 Open
 ----
+Issue 21.
+Summary:  Clarify <custom-ident> restrictions.
+From:     Manuel Rego Casasnovas
+Comment:  https://lists.w3.org/Archives/Public/www-style/2016Mar/0247.html
+Response: https://lists.w3.org/Archives/Public/www-style/2016Jun/0031.html
+Closed:   Invalid
+----