Again a complete rework based on older source

Rewrote:
function MediaInfoDLLVersion()
function MediaInfoFileFormat()
function MediaInfoFileSize()
function MediaInfoFilePlayTime()
function MediaInfoStreamCount()
function MediaInfoVideoCount()
function MediaInfoAudioCount()
function MediaInfoFileCodecs()
function MediaInfoFileVideoCodecs()
function MediaInfoFileAudioCodecs()
function MediaInfoFileFirstVideoCodec()
function MediaInfoFileFirstAudioCodec()