0.9 this version has not been(but is being) heavily commented,and,some comment is outdated.
    so don't lose your mind when puzzled by strange code blocks.
1 this document is created under linux,you may encounter \n\r problems under windows.
2 all source-code is here,but some big-size file like diskimage and binary-file are deleted.
3 for more information,join our maillist http://163.fm/2oxxXKy.