Added calculation of availabilityStartTime MPD attribute. Change-Id: I00876005c71f28ea83fb5d9ba0ad1f19f1d08e69
Change-Id: If114b9f10e029cb8ca53ae64c865a46558d1daca
Packager has all the capabilities of single_packager, so we don't need single_packager any more. Change-Id: I3e4dad86eaaa7e798cc3b6cd54838328cd1b45c9