added function to animate/reset elements using css animations
scrolling mutators will resize timeline accordingly
world waiting screen elements animations reenabled
(wip) sector actvation on scroll
level type now using class instead of data-attribute
removed deprecated (from early prototype stage) world html elements
added elevation classes to stage layer's first level sectors
layout debugging using box-shadow instead of border to avoid size issues

use box-shadow instead of border because it doesn't affect element's outer
dimensions and thus doesn't break layout, it's also lighter so less "intrusive"
interactive world and blog  test positioning

also changed colors (removed blue in favor of white)
new spinner class (not in use yet)
positioning of world landing zone stickers

stickers show direction of ol/new posts and navigation back to subscribe
cosmetic changes : background to white, positioning in waiting sreen