widl: Move type_new_enum, type_new_struct, type_new_encapsulated_union and type_new_unencapsulated_union to typetree.c.

widl: Move the pointer referent, array element, function return type and interface inheritance properties from type_t to details structures for the appropriate types.

It isn't valid in MIDL or the FreeDCE IDL compiler, nor does it appear
in the DCE/RPC or C99 specs.

widl: Fix get_explicit_generic_handle_type and is_context_handle to detect attributes set on typedefs other than the first.

Change get_explicit_handle_var to use accessors for the type structure.

Invert the property since an array being declared as a pointer is more
surprising than an array being declared as an array.

Provide an accessor, type_array_is_decl_as_ptr.

Default behavior of lcms is to abort the process when it encounters
an error it considers fatal, such as a corrupt color profile.