Add images to README.

README.md

@@ -1,19 +1,22 @@
 # Image to Minecraft Map
 
-### Live App: [https://frumple.github.io/image-to-minecraft-map][app]
+A web application that converts images to Minecraft NBT map .dat files, allowing such images to be displayed in Minecraft.
 
-**Chrome and Edge are recommended.** Firefox has a known issue (see below). Safari is not currently supported.
+![photos-app](https://user-images.githubusercontent.com/68396/216803044-6cf1b116-d99d-4b95-818a-d7f8da15497a.png)
+![photos-minecraft](https://user-images.githubusercontent.com/68396/216803198-c1311fcb-5a41-4781-8e41-a3b2a7d8a35a.png)
 
-### Quick Start Instructions: [https://github.com/Frumple/image-to-minecraft-map/wiki][wiki]
+## How to Use
 
-A web application that converts images to Minecraft NBT map .dat files, allowing such images to be displayed in Minecraft.
+### Live Application: [https://frumple.github.io/image-to-minecraft-map][app]
+
+**Chrome and Edge are recommended.** Firefox has a known issue (see below). Safari is not currently supported.
 
-If you think you've discovered a bug, please report it as an [issue][issues]. Be sure to provide as much detail as possible including exact steps to reproduce, settings, image file, and browser used.
+### Quick Start Instructions: [https://github.com/Frumple/image-to-minecraft-map/wiki][wiki]
 
 ## Features
 
 - Drag-and-drop multiple image files at once and process them simultaneously.
-- Split an image into multiple horizontal and vertical maps, in grid patterns such as 2x2, 3x3, etc.
+- Split an image into multiple maps horizontally and vertically, into grid patterns such as 2x2, 3x3, etc.
 - Download maps as .dat files, or a .zip file containing the .dat files.
 - Supports various color difference algorithms: CompuPhase, Euclidean, DeltaE 1976 and 2000, and CMC 1984.
 - Supports Floyd-Steinberg dithering.
@@ -48,16 +51,21 @@ Start the development server:
 
 This application implements the ["CompuPhase" color difference algorithm][compuphase], provided under the [Creative Commons BY-SA 3.0 License][cc-by-sa-3].
 
+Sample images used in this README:
+- "Rainbow-Lorikeet-1" by "John" at https://www.flickr.com/photos/34534185@N00/9004576204, available under the [Creative Commons BY-SA 2.0 License][cc-by-sa-2].
+- "Rubber Duck in Seoul" by "travel oriented" at https://www.flickr.com/photos/99958070@N02/15348035017, available under the [Creative Commons BY-SA 2.0 License][cc-by-sa-2].
+
 ## License
 
 Image to Minecraft Map is licensed under the [MIT License][mit].
 
 Image to Minecraft Map is not affiliated in any way with Mojang or Microsoft.
 
 [app]: https://frumple.github.io/image-to-minecraft-map
+[cc-by-sa-2]: https://creativecommons.org/licenses/by-sa/2.0/
+[cc-by-sa-3]: https://creativecommons.org/licenses/by-sa/3.0/
 [color.js]: https://colorjs.io/
 [compuphase]: https://www.compuphase.com/cmetric.htm
-[cc-by-sa-3]: https://creativecommons.org/licenses/by-sa/3.0/
 [issues]: https://github.com/Frumple/image-to-minecraft-map/issues
 [jszip]: https://github.com/Stuk/jszip
 [mit]: https://choosealicense.com/licenses/mit/