Draft: docstrings for the submodules

src/Mod/Draft/draftobjects/__init__.py

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+"""Functions and classes that define custom scripted objects.
+
+These classes define a custom object which is based on one of the core
+objects defined in C++. The custom object inherits some basic properties,
+and new properties are added.
+
+Most Draft objects are based on Part::Part2DObject.
+"""