add basic files for express
Revert "add basic files for express"

This reverts commit cbafb0af67a783cf70346aed0246e83f62cd63a3.
IssueID 16
- add basic files for express(ejs)/nodejs
IssueID 16
- simple chat program with socket.io / express
IssueID 16
- simple chat program
- refactored source codes
- reviewed file names
IssueID 16
- simple chat
- auto filled host name and port number