Remove execute bits for all test scripts and install them into
doc/examples.
Make sure check-py and check-tcl targets work.
Set a conditional for Python3 or Python2 and install/test the correct
script file.
Use Makefile variables instead of configure substitutions wherever
possible.
Generate tcltest.tcl at make time to insert installation library path
into the script so that tests pass.
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.
Michael Black W9MDB