Add --stop-after-kill to Readme

README.md

@@ -134,6 +134,8 @@ You can pass several options to the `pelita` command to help you with testing.
 
 - **`--stop-at ROUND`** you can pass the `--stop-at` option to the `pelita` command to stop a game at a specific round. You can then, for example, show the grid, play the next turns step by step, etc.
 
+- **`--stop-after-kill`** similarly, this will stop `pelita` every time that a bot has been killed.
+
 - **`--null`** you can pass the option `--null` to the `pelita` command to suppress the graphical interface and just let the game play in the background. This is useful if you want to play many games and just look at their outcome, for example to gather statistics. (A better strategy to play games in the background is shown in [demo10_background_games.py](demo10_background_games.py)).
 
 - **`--ascii`** you can pass the option `--ascii` to the `pelita` command to  suppress the graphical interface and instead use a textual visualization in the terminal, which contains a lot of useful debug info.