Add history and usage images to readme

README.md

@@ -2,10 +2,24 @@
 dev: ![CI](https://github.com/hpi-swa-teaching/OhmPrettyPrint/workflows/CI/badge.svg?branch=dev)  
 master: ![CI](https://github.com/hpi-swa-teaching/OhmPrettyPrint/workflows/CI/badge.svg?branch=master)
 
+OmegaPrint is a tool which prettifies your code in a consistent way. It uses [Ohm/S](https://github.com/hpi-swa/Ohm-S) as a parser.
+
 ## How to install
 ```smalltalk
 Metacello new
-	baseline: 'OhmPrettyPrint';
+	baseline: 'OmegaPrint';
 	repository: 'github://HPI-SWA-Teaching/OhmPrettyPrint:dev/packages';
 	load
 ```
+
+## Usage
+After installing OmegaPrint you will find a button in all your code holders (for example the browser).
+![Hovering over formatter selection](/screenshots/hover_formatting_selection.png)
+![Formatter selection clicked](/screenshots/click_formatting_selection.png)
+
+Selecting OmegaPrint will show you a prettified version of your code. Be aware that comments are not fully implemented yet.
+
+For more information about the implementation visit our [wiki](https://github.com/hpi-swa-teaching/OhmPrettyPrint/wiki).
+
+## History
+- 2020: Tarik Alnawa, Felix Auringer, Paula Klinke, Patricia Sowa