Update README.md

README.md

@@ -14,6 +14,12 @@ By default this script:
 You can gradually improve documenation on projects by starting with relatively
 high limits and slowly moving these limits down.
 
+## Installation
+
+For now you have to install the beta version.
+
+`composer require --dev niels-de-blaauw/php-doc-check:^0.1.0@dev`
+
 ## Usage
 
 ```
@@ -79,4 +85,4 @@ regardless if they have a DocBlock?
 A: You *should* refactor very complex functions. However, adding DocBlocks
 for complex function is often easier and safer. This tool only checks the 
 availability of this type of documentation. Other tools, like [php Mess Detector](https://github.com/phpmd/phpmd), 
-can help you limit complexity.
+can help you limit complexity.