python.{prov,req}.files: removed redundant text file check.

python.{prov,req}.files: print diagnostics about skipped unknown .py files.

python.{prov,req}.files: skip unknown .py files when rpm-build-python

python.prov, python.req: enhanced error diagnostics.

Revert the change made in 0.40.1-alt1.

Imported brp-bytecompile_python and brp-hardlink_pyo_pyc from rpm-build.

python.prov, python.req: skip python invocation when invoked without arguments.

Introduced rpm-macros-python subpackage and moved non-python files there.

Fixed processing script files reported as 'python2 script text executable'.

Set __python macro to python2.7.
Fixed python.req.py and test.sh (use python2-base instead of python-base).
Fixed shebangs and interpreter calls (use versioned python).
Made the package require no python-base.

Assume that setuptools are required if the traditional Python build/install

Added macro python_version_nodots for retrieving python version

Fix bug when file may be skipped during 'provides' and 'requires' calculations

build-python3.)
.prov.py: generalize to generate longer provs, too.
%python_req_nohier added, the reverse to %python_req_hier
Print a bit more diagnostics for ignored/skipped/hidden autoreqs.

%python{,_build}_install: force deterministic behavior (useful in
compileall.py: depth-first processing (like in rpm-build-python3).