Added extensions and an example extension that merges models

jobs/process/BaseExtensionProcess.py

@@ -0,0 +1,20 @@
+from collections import OrderedDict
+from typing import ForwardRef
+from jobs.process.BaseProcess import BaseProcess
+
+
+class BaseExtensionProcess(BaseProcess):
+    process_id: int
+    config: OrderedDict
+    progress_bar: ForwardRef('tqdm') = None
+
+    def __init__(
+            self,
+            process_id: int,
+            job,
+            config: OrderedDict
+    ):
+        super().__init__(process_id, job, config)
+
+    def run(self):
+        super().run()