add missing files + move Monitor class from commands to controllers.

aircox_streamer/controllers/__init__.py

@@ -5,6 +5,7 @@ from .metadata import Metadata, Request
 from .streamer import Streamer
 from .streamers import Streamers
 from .sources import Source, PlaylistSource, QueueSource
+from .monitor import Monitor
 
 
 streamers = Streamers()
@@ -19,4 +20,6 @@ __all__ = (
     "Source",
     "PlaylistSource",
     "QueueSource",
+    "Monitor",
+    "streamers",
 )