make SwitchTransform return True/False as result when Python objects are requested instead of crashing when trying to cast bint values to PyObject*

fix isinstance(x, (A,B)) split optimisation: must set up BoolBinopNode correctly when creating it after type analysis

support non-Python-builtin types in Jedi generated declarations by using name strings instead of bare types

clean up directives setup in InterpretCompilerDirectives transform by moving the global part into __init__()

Clarify license position with respect to compilation output.

Thanks to Alok Singhal.

replace the currently broken BoolBinopNode by GenericBoolBinopNode to fix it and generally avoid redundancy

Add more libc and posix includes

- Add more types into posix.types
- Add new posix.resource, posix.signal and posix.time includes