Add configuration section to the Readme

Author: sascha-egerer

README.md

@@ -1,2 +1,13 @@
-# phpstan-typo3
- TYPO3 CMS class reflection extension for PHPStan & framework-specific rules
+# TYPO3 extension for PHPStan
+
+TYPO3 CMS class reflection extension for PHPStan & framework-specific rules
+
+## Configuration
+Put this into your phpstan.neon config:
+
+```
+includes:
+	- vendor/saschaegerer/phpstan-typo3/extension.neon
+ parameters:
+    bootstrap: %rootDir%/../../saschaegerer/phpstan-typo3/src/PhpstanTypo3Bootstrap.php
+```