Small bit of cleanup for Lookup
bindEvents utility method for cleaner event binding
Change the dialogue diagram to reset its start state when the states are reordered
Move the event bindings where the dialogue start_state is set when the states are reordered from the diagram to the state collection
Fix bindEvents() test description (s/delegate/bind)
Reset dialogue model's start_state when a state view is removed
Add the initial dialogue state in the dialogue state view collection instead of in the diagram view
Fallback to a null start start state in the dialogue apps's vumi_app.js