xkcd@rjanja: Add XKCD alt text under the image & other changes (read desc)

xkcd@rjanja/README.md

@@ -1,8 +1,3 @@
-
-To configure this desklet, edit the metadata.json file.
-
-The "quality" can be:
-
- - 0: Fastest rendering will use nearest neighbour interpolation when rendering. good setting.
- - 1: Higher quality rendering without using extra resources.
- - 2: Render the texture with the best quality available using extra memory.
+# xkcd comics viewer
+- Displays the latest xkcd comic on your desktop
+- Easily configurable to your desired style via the menu