Don't call tests with -verbose.

OUnit 2 produces a lot more output than the previous version.
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).
Add ctypes.stubs subpackage.
Rudimentary interface for C_stubs.
Basic code printing (WIP).
Add interface for ml_stubs module.
Printer for generated ML stubs.
Alien interface (WIP).
Generate function for retrieving primitive constructor names.
WIP