function renaming for sake of clarity
support #EXT-X-BYTERANGE
because of Flash limitation, whole fragment will be downloaded. However the byte-range will be extracted correctly.
stream playback is working successfully.
partial download would require usage of as3httpclient lib but it introduces a significant size overhead (because of HTTPS support)
parse #EXT-X-MEDIA:TYPE=AUDIO
and send event when such tags are found in playlist

data not used yet