Bug 960873 - Part 1: Refactor MediaDecoderReader.h into separate headers. r=cpearce, a=1.3+
Bug 960873 - Part 2: Create AudioCompactor class to minimize allocation slop. r=cpearce, a=1.3+

Based on original patch written by :gal.
Bug 960873 - Part 4: Make OMX use AudioCompactor. r=cpearce, a=1.3+