doc: link to similar project

Reviewed-on: https://git.zavage.net/Zavage-Software/wikicrawl/pulls/1

README.md

@@ -21,12 +21,17 @@ To install, run these commands in this directory:
     python ./launcher.py
 
 # Demo Videos on Youtube
+
  * https://www.youtube.com/watch?v=aFyQLUPXnU4
 
  * https://www.youtube.com/watch?v=Nh6ORbKOHnI
 
  * https://www.youtube.com/watch?v=DpuhHoPsSVM
 
+# Similar Projects and Links
+
+ * https://git.zx2c4.com/wiki-philosophy/about/
+ * https://xkcd.com/903/ (mouseover in xkcd comic)
 
 # Contact