Use CSS3 Animation for the "loading icon" blinking and move the definition of
the loading icon to CSS as well.
CSS3 Animations are supported by IE10, Firefox and using the -webkit prefix by
Chrome and Safari.
I've dropped the usage of element.classList in favour of supporting refreshing/
article downloading in IE9 (again). The classList stuff isn't necessarily
needed, as the elements in question only get one or no class assigned.
I've dropped no longer supported css options like:
the appearance option isn't supported by any browser, the -webkit-appearance
doesn't change anything visible.
-webkit-font-smoothing support was dropped in chrome 22 and font-smoothing
isn't specified anywhere.
Unified the page-counters before.
This makes processing of counters in javascript way more easier. The minimum
required browser versions for the needed CSS3 selectors are IE9, Firefox 3.5
and Chrome 5. Confirmed working with IE9, Firefox 24.6, Chrome 36, Mobile Safari
on iOS6.
An unintended side effect of CSS brackets is that theme designers are able to
implement there idea of brackets.
