Add received timestamp and basic xmldoc for header class
Add received timestamp and basic xmldoc for header class

UselessToucan/osu,ppy/osu,smoogipoo/osu,NeoAdonis/osu,peppy/osu,ppy/osu,UselessToucan/osu,smoogipoo/osu,smoogipoo/osu,smoogipooo/osu,NeoAdonis/osu,ppy/osu,peppy/osu,NeoAdonis/osu,peppy/osu,UselessToucan/osu,peppy/osu-new