css: move text-align to .vignette, so that avatar image is also affected

validation: remove unused files

index: redo form validation using rivets

register: redo form validation using rivets

contacts: use rivets more, don't spread model attributes

index: background color depends on bare jid since 96aec8cf1ae9

favicon: new ui element to display status (and incoming events in the future)

contacts: don't use 'presence' to determine pip color, use 'show'

index: improve onPresence() - default presence type is 'available', not 'online' - return early on all standard types that aren't currently handled - set default show and priority based on presence type - use status message in log - don't show status changes for contact type 'self'

contacts: fall back to bare jid for d/handle (to never show jid resource)