Updated project structure and some file names.

Restored `requirements.txt`

Updated `setup.py` to include new repository url and contact details.

Moved the rtsp code from `record` to `stream`.

Updated project structure to make it more readable and developer friendly - moved mixins to the `mixins` package, moved handlers to the `handlers` package.

Moved files not belonging to anything in particular to the `util` package.

Updated `camera` class to also defer login call.

Deleted unused files like `config_handler`.

reolinkapi/utils/util.py

@@ -0,0 +1,11 @@
+from threading import Thread
+
+
+def threaded(fn):
+    def wrapper(*args, **kwargs):
+        thread = Thread(target=fn, args=args, kwargs=kwargs)
+        thread.daemon = True
+        thread.start()
+        return thread
+
+    return wrapper