Also reorder its call in configure.ac which now allows the PYTHON_VERSION
environment variable to be recognized and processed correctly by the
build system.
Correctly add PYTHON_LIBS (correct ouput variable of AX_PYTHON_DEVEL) to the
Makefile for the Python bindings.
Update README.python for use of PYTHON_VERSION.
The increasing popularity of Python3 requires that Hamlib provide a
means of instruction for building and installing its module concurrent
with the Python2 module. README.python outlines the required steps.
py3test.py is a reworking of the pytest.py script for Python3 syntax.
Nate Bargmann