Update readme with presentation link

Tschis · Tschis · commit 7e7a0c83f55c · 2017-12-11T13:48:29.000-03:00
diff --git a/command/README.md b/command/README.md
@@ -36,6 +36,10 @@ Use the Command pattern when you want to
 * implement callback functionality
 * implement the undo functionality
 
+## Presentations
+
+* [Command Pattern](etc/presentation.html) 
+
 ## Real world examples
 
 * [java.lang.Runnable](http://docs.oracle.com/javase/8/docs/api/java/lang/Runnable.html)
