updated todos

README.md

@@ -14,7 +14,7 @@ A manual to run the code and get output in correct format is present: `nbody6_qu
     - [ ] Globular clusters 
     - [ ] Young/open clusters
     - [ ] stellar evolution/stellar formation
-- [ ] Make a slack channel
+- [x] Make a slack channel
 - [ ] Be clear about coding goals
 - [ ] Think of some hacks that can be fun to implement
 - [ ] Play with code to get a feeling of possibilities