created UserNameNiconicoWebTextSegment
implemented UserNameNiconicoWebTextSegment
created NumberAnchorNicnicoWebTextSegment
created SegmentsProsessionNiconicoWebTextSegmentBase
implemented SegmentsProsessionNiconicoWebTextSegmentBase
created HtmlAnchorElementNiconicoWebTextSegment
implemented HtmlAnchorElementNiconicoWebTextSegment