Add pagination back and add automatic sliding option

Update styleguide and implement a few fixes as a result

Use setTimeout instead of setInterval

Reduce the number of DOM updates when creating pagination

Final tweaks

Prevent calling the  method twice on load
Merge pull request #991 from lonelyplanet/remy-slider_update

Slider updates
Add slider ready event.
hotfix preloader animation
Added flash messages js util
Added flash messages js util spec