Readme (#5)

Author: pmarki

README.md

@@ -1,6 +1,22 @@
 # PHPStan Rules
 Set of additional PHPStan rules
 
+*For legacy codebase*
 - check if property and constant shouldn't be set as protected (when is not inherited or class is not abstract)
 - check if property name starts with underscore
-- check if constant name is uppercase
+- check if constant name is uppercase
+
+*PHPMD rules*
+- check for boolean argument flag
+- more coming soon ...
+
+## Installation
+
+Run `composer require --dev pmarki/phpstan-rules`
+
+Edit your phpstan configuration file and add 
+
+```
+includes:
+    - vendor/pmarki/phpstan-rules/extension.neon
+```