Added support for multiple time ranges in the load progress bar

closes #1253

Display a true load progress (with accounting all buffered regions)

Add played property for player

Correctly display played regions in progress-bar

Support #played in MediaFaker so tests would pass

Remove play-progress regions but add some opacity to play-progress

Remove opacity

Revert "Add played property for player"

This reverts commit 6d8bf982c23c85b0e17edf93d7b2d02ded8ff611.

Fixed an issue where a load progress of NaN was throwing an error

Reverted some remaining `played` changes

Updated the progress bar to encapsulate time ranges

In the previous commit the progress bar was broken up into timeranges.
This had the effect of looking broken, so now the progress bar covers
all time ranges, and the time ranges a subtley different in color
from the progress bar.
Added line to the change log for #1253