img: Add currency stock photo for blog post.

By Marco Verch, under CC-BY 2.0, from
<https://www.flickr.com/photos/149561324@N03/37818247734/>.
This commit is contained in:
Brett Smith 2017-11-22 11:09:47 -05:00
parent 8db3cc0eb7
commit ab2abe5cdb

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