[vendor] add jlayout and jquery ui libraries
[rooms] use layouts in rooms and make footer resizable
Textchat implementation.
[chat] submit on a return keystroke
[chat] display author name
[chat] group messages when from the same author and within two minutes
Merge branch 'roomErgonomy'

Conflicts:
	src/frontend/room.coffee
	www/views/room.jade
[chat] can't send empty message
[ergonomy] disable resizable thumbnail bar
[chat] add jScrollPane and use it for message display
[chat] stylize scrollbar
Merge pull request #24 from Paulloz/textchat

Conflicts:
	Cakefile
	www/views/room.jade