Add a low-poly penguin and a texture for it. Add a UV test texture.

dist/share/b3view/textures/license.txt

@@ -0,0 +1,7 @@
+The penguin texture is derived from:
+https://commons.wikimedia.org/wiki/File:Manchot_royal_-_King_Penguin.jpg
+Photo copyright (c) Samuel Blanc, CC BY-SA 3.0 <https://creativecommons.org/licenses/by-sa/3.0>, via Wikimedia Commons
+
+The following image was used for proportions but not included in any form:
+https://commons.wikimedia.org/wiki/File:King_Penguins_at_Salisbury_Plain_(5724038519).jpg
+Photo copyright (c) Liam Quinn from Canada, CC BY-SA 2.0 <https://creativecommons.org/licenses/by-sa/2.0>, via Wikimedia Commons

projects/textures/license.txt

@@ -0,0 +1,7 @@
+The penguin texture is derived from:
+https://commons.wikimedia.org/wiki/File:Manchot_royal_-_King_Penguin.jpg
+Photo copyright (c) Samuel Blanc, CC BY-SA 3.0 <https://creativecommons.org/licenses/by-sa/3.0>, via Wikimedia Commons
+
+The following image was used for proportions but not included in any form:
+https://commons.wikimedia.org/wiki/File:King_Penguins_at_Salisbury_Plain_(5724038519).jpg
+Photo copyright (c) Liam Quinn from Canada, CC BY-SA 2.0 <https://creativecommons.org/licenses/by-sa/2.0>, via Wikimedia Commons

readme.md

@@ -240,8 +240,13 @@ only applies to Visual Studio users.)
   such as from <https://sledjhamr.org/source/media/Irrlicht/>)
   **"Feel free to use however you like, commercial etc, credits are
   Appreciated..."** -Psionic
-* icon (b3view.xcf, p3view.png) Creative Commons Attribution Share-Alike
-  4.0 [poikilos](https://poikilos.org)
+* The penguin texture is derived from:
+  https://commons.wikimedia.org/wiki/File:Manchot_royal_-_King_Penguin.jpg
+  Photo copyright (c) Samuel Blanc, CC BY-SA 3.0
+  <https://creativecommons.org/licenses/by-sa/3.0>, via Wikimedia
+  Commons
+* All media not mentioned above are Creative Commons Attribution
+  Share-Alike 4.0 by [Poikilos](https://poikilos.org).
 * All files not mentioned above, and not described in text files in the
   same folder as media (such as "build" folder) are licensed under the
   **GPL v3** as per <https://code.google.com/archive/p/b3view/>

update-dist.sh

@@ -0,0 +1,12 @@
+#!/bin/sh
+src=projects/textures/penguin.png
+dst=../../dist/share/b3view/textures/penguin.png
+if [ ! -f "$src" ]; then
+    echo "* There is nothing to do because there is no \"$src\". See the xcf file there instead. To use this script, export it to png where there is no png then run this script."
+    exit 0
+fi
+if [ ! -f "$dst" ]; then
+    echo "Error: There is no \"$dst\" to update, so for safety nothing will be done."
+    exit 1
+fi
+cp "$src" "$dst"