Add support for stats & code cleanup (#297)

* Add support for stats & code cleanup

* Add more stats

* Move code into own object

* Add to API

* Update API

* Add error handling

* fix lint

* fix block io

hassio/addons/addon.py

@@ -596,6 +596,14 @@ class Addon(CoreSysAttributes):
         """
         return self.instance.logs()
 
+    @check_installed
+    def stats(self):
+        """Return stats of container.
+
+        Return a coroutine.
+        """
+        return self.instance.stats()
+
     @check_installed
     async def rebuild(self):
         """Performe a rebuild of local build addon."""