Merge pull request #3 from springermac/modulegraph

Python 3 updates.
Issue #85: Reduce the number of modules in base_library.zip.
Issue #85: Wrap imp.get_magic() for Python 3.
Issue #85: Fix pyi_importers.py to use _frozen_importlib.
Issue #85: Fix CExtensionImporter to use _frozen_importlib module and to try multiple C extension suffixes.
Issue #85: Include encodings.ascii in the base_library.zip.
Issue #85: Fix test basic/test_module_reload.
Issue #85: Bundle base_library.zip with onefile .exe.
Issue #85: Fix test basic/test_onefile_ctypes.py.
Issue #85: Fix test basic/test_option_verbose.py.
Issue #85: Fix custom run-time Python options like -W ignore.
Issue #85: Bundle again dynamic libraries with frozen executables.
Issue #85: Use suffix cpython-33m.so for extension modules.