Added a new HtmlMediaEvent for "error" and fire it when we get a NetStream.Play.StreamNotFound event. Right now there isn't a mechanism to push HTML5 MediaError error codes through the events but we might think about adding it.
Merge branch 'master' of https://github.com/realgravity/mediaelement into flash_video_error_support

Conflicts:
	src/flash/HtmlMediaEvent.as
	src/flash/htmlelements/VideoElement.as
[#46295277] Create media errors in Flash that mirror those for the HTML5 <video> element.
Implement the MEDIA_ERR_SRC_NOT_SUPPORTED media error when the VideoElement encounters the NetStream.Play.StreamNotFound event.
[#46295277] Create media errors in Flash that mirror those for the HTML5 <video> element.
Make media error code type numeric for strict compilation.
Merge branch 'flash_video_error_support' of https://github.com/realgravity/mediaelement into build
Rebuild swf files.

Conflicts:
	build/flashmediaelement.swf
	src/flash/HtmlMediaEvent.as
	src/flash/htmlelements/VideoElement.as