wipe transition

- add ngAnimate
- add css for wipe (max-height) transition
refactor animations

- make mark and li fields fly in from diagonals
- make boxes fade in (replaces slide)
whitespace
tweak transitions

- speed up fade
- remove fly-in for li elements
tweak timings

- slow down every 2nd item
- add a delay to ever 3rd item
- extra delay so first item is the last to settle