Test jQuery Event.fix on r5390

• The patched jquery.js (r5390) file
• patch for the event.js source file (don't use old r5374)
• simple event stress using r4663 (1.2.3)
• simple event stress using r5390 (1.2.4a)
• simple event stress using r5390 patched
• snapshot of the profiler on r4663
• snapshot of the profiler on r5390
• snapshot of the profiler on r5390 patched

References to the related Google Groups threads:

older jquery-dev thread.
newer jquery-dev thread.