update readme again

README.md

@@ -24,15 +24,19 @@ and inconsistent. If you set up your editor correctly, it will take care of most
 - Distribute appropriate code to people with those responsibilities
 - Have everyone upload their respective code to their sections of the gitlab
 
-## Code
-
-Everything is in [src/](src).
-A mostly untouched copy of [Scott's original code](https://git.therats.win/scott/threaded_network_chat) is also in [old/](old).
-A reformatted version of that code is also in [modified-example.cc](modified-example.cc) but it can be ignored.
-
 ## Build
 
 ```
-cd src/
 make
 ```
+
+## Usage
+
+```
+./ct # run as server
+```
+
+```
+./ct client # run as client
+```
+