Fix socket.io over unsecure http

Allow chat socket to port 3004 for http connections
Refactor, code cleanup, comment
Add timestamp to messages
Timestamp timezone offset
Incoming message audio signal
Add button for mute/unmute incoming message audio notification
Set focus to message input after choosing username
Upgrade licode to upstream rev ecc8c4d
New config settings for licode
New erizo.js build of upstream rev ecc8c4d
New SSL certificate
Update README, add stack target command
Version 1.1.0