Support MSE API or DASH for non-bufferred playing

[dascritch]

from dascritch/ondemiroir-audio-tag#22

May help issues when switching rapidly position at low bandwith.

• MediaSource specification at MDN
• https://www.w3.org/TR/2013/WD-media-source-20130129/#attributes-1
• Enhancement is becoming urgent, as a correct method to makes progressive downloads complying with very big media files over HTTP2Push <a id="elapse"> tag may be linked to "undefined" #39
• Maybe I have to use DASH format :( https://hacks.mozilla.org/2015/07/streaming-media-on-demand-with-media-source-extensions/

Well, not useful. As the #39 bug is mainly a configuration or a protocol missing.
See also http://blog.eleven-labs.com/fr/video-live-dash-hls/

[dascritch]

We tried it on our http://cpu.pm website. We just needed to document it.