Update README.md

README.md

@@ -8,9 +8,27 @@ Addon for [groundskeeper](https://github.com/Couto/groundskeeper)
 $ npm install --save-dev ember-cli-groundskeeper
 ```
 ## Usage
+Example:
 
-See the [broccoli-groundskeeper](https://github.com/MadMG/broccoli-groundskeeper) or Groundskeeper [usage](https://github.com/Couto/groundskeeper#usage).
+```
+var app = new EmberApp({
+  groundskeeper: {
+    "processFiles": ['app.js'],
+    "console": true,
+    "debugger": false,
+    "namespace": [
+      "logger.debug",
+      "logger.info"]
+  }
+});
+```
+
+__processFiles__
+
+Is an array with file names which will be processed. The source path must end with any of the array entries. If the array is empty all files of the source tree will be processed.
+
+See [broccoli-groundskeeper](https://github.com/MadMG/broccoli-groundskeeper) or Groundskeeper [usage](https://github.com/Couto/groundskeeper#usage) for further options.
 
 ## License
 
-MIT © [Martin Groller](https://github.com/MadMG)
+MIT © [Martin Groller](https://github.com/MadMG)