update core lib & add comments
restruct
support more system event & rewrite the data reciver algorithm & add more comments
redefined the Payload_data exchange format standard
other change
little revise
update README
fix bug in Payload_data translation, add data "type" to exchange standard format
add data "type" to exchange standard format, add .close(), .destroy() method
add a browser script lib to simpify wsf opeartion
rewrite test server and benchmark, add press test
update readme