spec: try to improve specification of json-generator-read and add json-fold!

Author: Amirouche

index.html

@@ -74,4 +74,4 @@ <h1>SRFI 180: JSON</h1>
             <input name="list"
                    type="hidden"
                    value="srfi-180@srfi.schemers.org"></form></a></li></ul>
-    <h2>Abstract</h2><p>This library describes a JavaScript Object Notation (JSON) parser and printer.  It supports streaming parses of JSON that may be bigger than memory.</p></body></html>
+    <h2>Abstract</h2><p>This library describes a JavaScript Object Notation (JSON) parser and printer.  It supports JSON that may be bigger than memory.</p></body></html>