Reorganizing source: splitting python2 and python3
o Python v2.x specific code resides in the subdirectory python2/ o Python v3.x specific code can be found in python3/ (previously py3k/) o setup.py, make_release.py and MANIFEST.in, unittests.py are using the new locations o setup.py and unittests.py will raise a RuntimeError when unsupported Python version is used o README has been corrected o python3/tests/test_examples.py doesn't use py3k-module anymore o client.py has been moved to python2/examples/ o More copyright changes