Add command line utility to pretty print TOC files
Merge pull request #129 from lvillani/pprint-toc-cli-util

Add command line utility to pretty print TOC files
Add runtime hook to create PyQt5.Qt 'Composite Module'

PyQt5 exposes the PyQt5.Qt module which contains symbols from all other PyQt5
packages. PyQt5 uses Python's C API to import all modules and merge their
contents with PyQt5.Qt (see the generated sipQtcmodule.c file when compiling
PyQt5), but due to a bug in PyQt, it seems to skip all import-hooks machinery.

Here, we replicate what PyQt does but using native Python code, which we know
won't bypass the import hooks mechanism described in PEP-302.
Add hook for Python Xlib wrapper