Changes

# '''Device Channel to Mozilla Presence''' - let a '''user ''' update her online status and set a custom status message # '''Applications registration''' - let a '''developer ''' register an application# '''Applications permissions''' - let a '''user ''' manage applications access to their presence# '''Status updates''' - let an '''application ''' receive status updates# '''Live Notifications''' - let an '''application ''' send a live notification and a user receive it.