Revert "Close GH-630: prevent default action for simple html5 media events. fixes #573, fixes #620 (duplicate bug)."

This reverts commit 15544c3d05988cda490ab491d9d68045f1468624.
Fixed the custom fallback message test which would break when ie8 capitalized tag names
Fixed the getAttributes test in ie8, which reports all attrs, whether or not they were set
Fixed IE8 tests and flaky fonts
Bump version to 4.2.0
Rotating CHANGELOG
Fixed changelog version
Merge branch 'stable' of github.com:videojs/video.js into stable
Added back in reverted #630