add option to mute background videos

[oslego]

This pull request adds the muted property to a video element that is used as a slide background.

Using the data-background-video-muted attribute together with data-background-video mutes the video. Useful for videos that can't be edited.

[hakimel]

Great addition. Any chance you can remove the whitespace changes to avoid conflicts? We basically want these changes: oslego@8bbc297?w=1

[oslego]

I made the required changes and rebased from latest dev branch. Does this look gook?

[hakimel]

Weird, it looks like those whitespace changes still snuck their way in but I went ahead and merged this anyway. Thanks for the PR!

[oslego]

I think that happened because of a merge I did with my previously pushed
branch. I'm sorry! End-of-line whitespace removal happens automatically in
my Atom editor. I disabled that for future work.

Thanks for accepting the PR!

On Thu, Dec 3, 2015 at 10:50 AM Hakim El Hattab notifications@github.com
wrote:

Weird, it looks like those whitespace changes still snuck their way in but
I went ahead and merged this anyway. Thanks for the PR!

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