Async progress indicator

Hi guys,
After the progressbar refactor we removed the animations support that let us to make asynchronous progress indicator.
What was decided, our progressbar should support asynchronous progress indicator or not?
If we will support this, I want to work on it before the 1.6 release.
Thanks.<br clear="all">
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Eduardo Lundgren
Software Engineer
Liferay, Inc.
Enterprise. Open Source. For Life.