Pytaglib

- as the library has been used for several years now without any known
bugs, I declare it as stable.
- cleaned up source. Especially simplified several statements due to improvements
in recent Cython versions.
- The workaround for MPEG files with taglib <= 1.8 is now forced disabled if taglib version >= 1.9
is detected.
- update copyright dates

- remove Cython dependency by shipping taglib.cpp

- remove a test file that looked a little non-free
- update copyright dates

- fix Python 2.6 support in pyprinttags
- update copyright dates

- add support for Python 2.6 by replacing some methods added in 2.7

- move cython from install_requires to setup_requires