#32: indenting
#32: adding delete button
#32: indenting
#32: implementing delete on /
#32: supporting message delete from / to /user
#32: remove debug message
#32: changing the debug level of socket.io
fixing a problem to fail to send the second, third , ... messages
#32: support deleting message from /user to /
Merge branch 'delete-button-id-32'