Add ctypes.stubs subpackage.
Generation of 'external' declarations from types.
Add bigarray support for external declarations.
Basic read/write stub generation support.
Record properties of global names.
C stub generation from types (WIP).
Basic printer for generated ML code.
Handle external names in generated ML stubs.
Add interface for ml_stubs module.
Generate wrapper functions for ml stubs.

Pass projected raw pointers to C.
Omit trivial wrappers during stub generation.
Disable 'noalloc' for the moment.

We need an interface for specifying interaction with callbacks.
Disable the "float" attribute for the moment.
Generate byte code stub, passing arguments using argc/argv.
Flush formatter at end of C generation.
Packing and unpacking of structures and unions.
Give views an identity.
Give structured types an identity.
More work on view stub generation.
Extend registry to structured types.