Add todo to readme

On the video I've also posted a comment which has this list + me pointing some minor mistakes in the vid

Author: simon-tiger

README.md

@@ -1,3 +1,13 @@
 # Wave-Function-Collapse
 
 [WFC using local storage](https://editor.p5js.org/kfahn/full/iNUF-Lgdf)
+
+## Todo (section pull-requested by simon-tiger)
+
+- [x] Basic algorithm
+- [x] Socket-based rules
+- [ ] Recursive entropy reduction
+- [ ] Shannon entropy
+- [ ] Overlapping model
+
+On the video I've also posted a comment which has this list + me pointing some minor mistakes in the vid