Fixed scroll page bug.
Message line color
changed message nick background color
Changed message time background for current user.
Added nick restriction.
prevent empty nicks
Added nick persistence in cookie
Change message name on nick rename
Added log messages
added start_writing and stop_writing method calls.
Added writing state support
modularize scrollToBottom
removed ba-linkify.js from dependency list.
changed url regex
worked on linkify structure.
remove writing status message for current user.