This reorganizes the Python code, scraps the current testing
infrastructure, and implements a simple test discovery and run script
based on the standard Python unittest library so we can trust that our
tests are running.

These changes probably should have been in 3b0fefb2 but
were overlooked.

This is in preparation of moving all tests into a separate package to
enable ease of coverage checking and testing.

This code branches out of the alpha/early_adopter code and begins
building toward the beta API.

Conflicts:
	src/python/src/setup.py

Conditionally runs the tests depending on the availability of Python
versions (because Travis is the worst).

Also set up environment-related details needed for a smooth Cython
experience: have the test script avoid rebuilding all dependencies if the
virtualenv directory already exists, have the PyPI distribution script
distribute the Cython generated C code rather than the .pyx files.

Exposes the C core batch API to the Python layers. Provides a shim to
enable the old Python API to remain the same (for now).

Updated to version 0.9.0a0.

Refactors early_adopter such that interface-specific code is located in
the framework module as a submodule `alpha`.

They were two halves of the same whole.

This completes issue #726. All that cascading activation stuff just
didn't work out as cleanly as I had hoped it would.

This provides for now what should be a nicer interface for code
generation than that of the Face layer. In terms of abstraction
it's conceptually very similar so the two should probably be
merged as soon as is reasonable.