First attempt at ripping out agnostic code into ifcopenshell.api namespace. See #1399.

src/ifcopenshell-python/ifcopenshell/api/attribute/edit_attributes.py

@@ -0,0 +1,18 @@
+from ifcopenshell.api.owner.api import update_owner_history
+
+
+class Usecase():
+    def __init__(self, file, settings=None):
+        self.file = file
+        self.settings = {
+            "product": None,
+            "attributes": {}
+        }
+        for key, value in settings.items():
+            self.settings[key] = value
+
+    def execute(self):
+        for name, value in self.settings["attributes"].items():
+            setattr(self.settings["product"], name, value)
+        if hasattr(self.settings["product"], "OwnerHistory"):
+            update_owner_history(self.settings["product"])