XMPPInterface: sendPresence() shortcut method

index: profile window, unregister button

register: cancel button

coffee: move ClientState to tram.coffee

XMPPInterface: unregister(), call to cancel registration

index: progress bar on connect

progress: 0 and 100 are special cases, they need extra visuals

register: progress bar on top

XMPPInterface: also trigger 'status' event and pass current status as-is Literal statuses are nice to bind to individually, but that's not always enough.

html: update to jQuery 2.2.3