implemented basic reply function
added to_user_id when reply to private message.
but, 'currentUserId' was initialized when transfer 'atmos' object.
fixed issue that fail to display messages except for latest message.
fixed issue that user name was folded
fixed issue that my user id is included when reply
arranged layout and design.
removed unnecessary logic.
Merge pull request #2 from haushinka2dx/reply-function

Reply function