Implemented basic threaded tasks for long-running functionality

openflexure_microscope/utilities.py

@@ -26,4 +26,12 @@ def filter_dict(dictionary: dict, keys: list):
 	# Create new dictionary by running reduce on key, val pairs
 	out = reduce(lambda x, y: {y: x}, reversed(keys), val)
 	
-	return out
+	return out
+
+def entry_by_id(id: str, object_list: list):
+    """Return an object from a list, if <object>.id matches id argument."""
+    found = None
+    for o in object_list:
+        if o.id == id:
+            found = o
+    return found