Add Unsplash Wallpapers

[zayzou]

NOTE: Each discrete (stand-alone) request should be in its own issue.

Put "Add ____" as Title
[x] Done

Provide a link to the proposed addition.
Place link here.

Explain why it should be added
A breathtaking photo for your desktop wallpaper, every day.

Unsplash is the world’s premier platform for HD photography. Millions of submitted photos have been narrowed down to the absolute best by the Unsplash community. Today, you get to enjoy the fruits of our labor.

From space pics taken by NASA, to bewitching urban streetscapes, to astounding shots of nature taken by high-flying drones—find mesmerizing wallpaper for your Mac in seconds:

-Click the Unsplash button on the toolbar

-Pick a photo

-Ba-boom! Fresh wallpaper.

Two clicks. That’s it. No fidgeting around with the settings. We’ve made it dead simple. And if you’d like, the app will let you automatically change your wallpaper, every day or week (your pick!)

Additional context
Add any other context or screenshots about the feature request here.

Issue Checklist

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• I have checked for other similar issues
• I have explained why this change is important
• I have added necessary documentation (if appropriate)