Update CHANGELOG.

CHANGELOG

@@ -63,10 +63,10 @@ v0.6.0 (2010-05-??)
         lifecycle. Persistent connections can lead to unpredictable or strange 
         behaviours, so they should be used with extreme care.
 
-  * Introduced the Predis\Pipeline\IExecutor interface. Classes implementing 
-    this interface are now used internally by the Predis\CommandPipeline class 
-    to change the behaviour of the pipeline when writing/reading commands from 
-    one or multiple servers. Here is the list of the default executors:
+  * Introduced the Predis\Pipeline\IPipelineExecutor interface. Classes that 
+    implements this interface are used internally by the Predis\CommandPipeline 
+    class to change the behaviour of the pipeline when writing/reading commands 
+    from one or multiple servers. Here is the list of the default executors:
       - Predis\Pipeline\StandardExecutor
         Exceptions generated by server errors might be thrown depending on the 
         options passed to the client (see "throw_on_error"). Instead, protocol