add demos based on jsfiddle

add demos:

http://jsfiddle.net/gh/get/extjs/4.2/icattlecoder/jsfiddle/tree/master/resumbleupload
http://jsfiddle.net/gh/get/extjs/4.2/icattlecoder/jsfiddle/tree/master/uptoken
http://jsfiddle.net/gh/get/library/pure/icattlecoder/jsfiddle/tree/master/formupload
http://jsfiddle.net/gh/get/jquery/1.9.1/icattlecoder/jsfiddle/tree/master/ajaxupload