load intro state controller with ui-router
align columns on state-1 with fa-origin
set up fa-animate-enter and leave with ui-view
replace scroll var with t convention
set delay for entrance animations, to let leave animations finish first
move leaveAnimationDuration's for states into $state config in
routes.js.  create prevState service
set up ui-sref links for state nav
add css color transitions for state nav
hide state nav and footer for state 1 initially