reflect latest changes in getusermedia on mapping to media element
updated links back to spec

Conflicts:
	mediacapture-streams/mediastreams-as-media-elements/video-assignment.html
test for the output element
Even test on details element
Test the steps for pausing a media element when removing from a document
Combine all canPlayType tests into a single test framework

There is much more of canPlayType to be tested in later commits.
Add the missing types and codecs used in spec examples
Add the Opus codec, supported by at least Gecko and Chromium
Test that bogus codecs are not supported

Chrome and Safari fail this assertion.
ref test for wbr
use Ahem font to force the rendering
update spec link
fix ref test and add <meta name="flags" content"ahem>
add tests on setting defaultValue
Change text to make sure the ref test passes only if the Ahem font is loaded
add tests for value flag mode is in default/value mode
test toggle event attributes
add more use cases
update test description
refactor common assertions
fix
Code formatting
rm whitespaces
Test that re-inserting a video does not cause it to play