UInt32.(of|to)_int32 and UInt64.(of|to)_int64 functions.
Expose the type of the containing structure in boxed_field.
Fold over the fields of a structured type.
Expose field type function.
Tweak the declaration of offsetof's type.
Test folds over struct fields.
Test folds over union fields.
More efficient string view implementation.
Notes on closure finalisation.
Don't use functions introduced in 4.02 (e.g. Set.S.of_list) yet.
Fix hard-coded alloc size.
Merge pull request #53 from yallop/32-bit-fixes

Fix hard-coded alloc size.
Split static semantics (types and type formatting) out of ctypes.ml
Split out dynamic semantics (execution, value printing, views).
Remove some unnecessary type ascriptions.
Type printing module.
Value printing module.
Split out and rename Identify_closure module.
Split out stubs used only in the static semantics.
Split out stubs used only in the dynamic semantics.