Update documentation for the 2.2.0 release. (CVS 335)

FossilOrigin-Name: 14392258c5b6385091be8d684e3ea6841941b483
diff --git a/www/changes.tcl b/www/changes.tcl
index 09bd409..ec7b49a 100644
--- a/www/changes.tcl
+++ b/www/changes.tcl
@@ -17,7 +17,11 @@
   puts "<DD><P><UL>$desc</UL></P></DD>"
 }
 
-chng {2001 Dec 16 (2.1.8)} {
+chng {2001 Dec 22 (2.2.0)} {
+<li>Columns of type INTEGER PRIMARY KEY are actually used as the primary
+    key in underlying B-Tree representation of the table.</li>
+<li>Several obscure, unrelated bugs were found and fixed while 
+    implemented the integer primary key change of the previous bullet.</li>
 <li>Added the ability to specify "*" as part of a larger column list in
     the result section of a SELECT statement.  For example:
     <nobr>"<b>SELECT rowid, * FROM table1;</b>"</nobr>.</li>