update readme

readme.md

@@ -632,6 +632,7 @@ a means of exploring some very beautiful math.
 
 ## TODO
 
+* Update CLI option text in this readme to include Zipf distribution options
 * ~~Try invoking GC at end of workloads to reduce paging to disk~~ DONE
 * ~~Hold graph data in memory until another graph is read-in? ABANDONED UNABANDONED~~ DONE
     * ~~*No, this won't work, because BiGpairSEQ simulations alter the underlying graph based on filtering constraints. Changes would cascade with multiple experiments.*~~