Add boilerplate files for new HTML5 media player modifier
Implement new submodifier: don't unset src and call load() on teardown

Some HTML5 devices get upset if you follow the HTML5 media guidelines and
unset the media element's src property, followed by calling load(), when
tearing down the media element. In this submodifier, do everything except
unsetting src and calling load() during teardown.
Merge branch 'master' into new-media-api-memoryleakunfix

Apply change to getSeekableRange(), etc
Merge pull request #195 from fmtvp/new-media-api-memoryleakunfix

Memory leak 'unfix' for HTML5 media modifier