Show member documentation in source order (#254)

Even if the order still ends up bad, this gives us the power to more easily change it in future, simply by reordering the source code.

Author: eric-wieser

doc/conf.py

@@ -89,6 +89,7 @@ def add_source_parser(_old_add_source_parser, self, *args, **kwargs):
         # Make sure that any autodoc declarations show the right members
         "members": True,
         "inherited-members": True,
+        "member-order": "bysource",
         # "undoc-members": True,
         # "special-members": True,
         # "private-members": True,