Amend playTest to see if playtime actually progresses

And don't compare numbers in seek tests to be absolutely equal.
The numbers are now rounded then tested
Make the playTest green
Fixes the tracking of the current play time, it was only being updated once seeked
The logs once getting it weren't helpful either as they returned the (correctly) calculated value, but the method returned the non-calc'ed value.
For Chrome quirk, add the css to the Soundcloud widget after creation
vjs.createElem doesn't like setting the style
Take the biggest version of the poster for the background