pleroma-fox-tan-shy.png: Add another version of pleroma-tan

Commissioned by https://shitposter.club/users/moonman and
drawn by https://shpposter.club/users/Nightingalle

Intended to be used when mastofe crashes out and allows to report a bug
among other things.

Should require a bit of modification on mastofe to use the image as it's more
of a vanilla flavour thing.

COPYING

@@ -15,6 +15,14 @@ priv/static/images/pleroma-tan.png
 
 ---
 
+The following files are copyright © 2019 shitposter.club, and are distributed
+under the Creative Commons Attribution 4.0 International license, you should
+have received a copy of the license file as CC-BY-4.0.
+
+priv/static/images/pleroma-fox-tan-shy.png
+
+---
+
 The following files are copyright © 2017-2019 Pleroma Authors
 <https://pleroma.social/>, and are distributed under the Creative Commons
 Attribution-ShareAlike 4.0 International license, you should have received