For mp4 outputs, a metadata box with version information is added to moov box. For mpd outputs, a text comment with version information is added in the beginning of mpd file. Issue #60 Change-Id: I783ba370781c0a8f77c910ff1172bad2e7edff75
Make it easier to be included and integrated into other code. Change-Id: I609881688cc20f8fac676cbd91fde4753af32ee5