Update drag/drop tutorial to use signed JARs (latest JRE security updates appear to have disabled untrusted access to native drag/drop); apply workaround for apparent issue with Executors.newCachedThreadPool() when running as an applet (IllegalThreadStateExceptions are thrown periodically and seemingly unpredictably).
pivot/trunk/core/src/org/apache/pivot/util/concurrent/Task.java
pivot/trunk/tutorials/www/drag-and-drop.xml