update python 2 to 3

1 add permission tree
2 update project python version 2 to 3

add ssh helper, sftp server, ssh server protocol

1 #102 #104 bug fixed
2 add xshell putty securecrt ssh helper
3 add sftp protocol server support
4 fix rz sz upload audit bug
5 fix sftp upload bug
6 cpu usage always 100% bug fixed

terminal normal bug fix

add zmodem sz protocol bug fix
terminal improvement

add zmodem sz protocol

add zmodem sz protocol
terminal improvement

restructure the project and abstract common function

restructure the project and abstract common function
1: sftp upload close connection bug fixed;
2: batch command execute function added;
3: rdp security bug fixed;
4: terminal record bug fixed;
5: other performance improvement

rdp file upload and clipboard function added

rdp file upload and clipboard function added

telnet remote control protocol support

telnet remote control protocol support

rdp vnc remote control protocol support

rdp vnc remote control protocol support

stable file upload

Fix large file upload to server chunks bug

statble release

stable version