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/mixins/alarm.py

@@ -0,0 +1,14 @@
+from typing import Dict
+
+
+class AlarmAPIMixin:
+    """API calls for getting device alarm information."""
+
+    def get_alarm_motion(self) -> Dict:
+        """
+        Gets the device alarm motion
+        See examples/response/GetAlarmMotion.json for example response data.
+        :return: response json
+        """
+        body = [{"cmd": "GetAlarm", "action": 1, "param": {"Alarm": {"channel": 0, "type": "md"}}}]
+        return self._execute_command('GetAlarm', body)