update for release

CHANGES.md

@@ -1 +1,8 @@
-This release modifies the testing structure and updates other support files.
+- Docblock and README updates
+
+- The Common\Select class, when binding values from a subselect, now checks for
+  `instanceof SubselectInterface` instead of `self`; the Select class now
+  implements SubselectInterface, so this should not be a BC break.
+
+- Subselects bound as where/having/etc conditions should now retain ?-bound
+  params.