Introduce Chars

This improves the implementation by introducing a class to manage the characters

README.md

@@ -22,15 +22,16 @@ actual code can then be found in the [_src/ilp_keyboard_layout_optimization_ sub
 We included [a bash script _pull_and_optimize.sh_
 ](https://git.tu-berlin.de/blutub3d/ilp_keyboard_layout_optimization/-/blob/main/pull_and_optimize.sh)
 in our codebase to streamline a remote development workflow. We work on the code on a 
-computer, that is well equipped for that task. The committed and pushed code then 
+computer, that is well-equipped for that task. The committed and pushed code then 
 gets processed on another machine, which uses this script, to update its code base 
-and run the parameters handed over. It is designed to have the Python script name 
-for execution with a Python interpreter and PySCIPOpt as the only parameter, e.g.
+and run the parameters handed over. It is designed to be called without parameters
+to execute the _optimize_ module of the [latest version released on Test.PyPI.org
+](https://test.pypi.org/project/ilp-keyboard-layout-optimization/).
 
 ```shell
-$ ./pull_and_optimize.sh ilp_optimize.py
+$ ./pull_and_optimize.sh
 ```
 
 The execution requires the Docker image of our repository [docker_pyscipopt
-](https://github.com/BjoernLudwigPTB/docker_pyscipopt) to be built in advance but it 
+](https://github.com/BjoernLudwigPTB/docker_pyscipopt) to be built in advance, but it 
 could be easily adapted for a local installation of the SCIP Optimization Suite.
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