Finished README

README.md

@@ -1,2 +1,25 @@
-yii-httpauth
+httpauth
+========
+A filter implementing [HTTP basic auth](http://en.wikipedia.org/wiki/Basic_access_authentication), protecting single API
+endpoints, specific actions and controllers or even entire applications.
+
+Installation
 ============
+Copy `HttpAuthFilter` into your `component` directory.
+
+Usage
+=====
+Modify the controller you wish to protect in a way that the `filters()` method starts of like this:
+```
+public function filters()
+{
+    return array(
+        array(
+            'HttpAuthFilter',
+        )
+        ...
+    );
+}
+```
+Make sure the filter is the first in the list and does not cover actions that should be reachable by unauthenticated
+users (which were just cruel).