Pytaglib

- ensure sources are included in sdist packages
- fix call to pyprinttags
- fix setup.py handling for non-utf8-locales
- rename pyprinttags to pyprinttags3 for python3 installs

- add "batch mode" to pyprinttags and allow several files at once
- add a man page for pyprinttags
- remove .travis.yml since travis' build system is too old for building pytaglib

- updated packaging information in setup.py

- implement a hack that works around a bug in taglib, leading
to several problems in connection with MP3 files with ID3v1
tags. Open files with `f=taglib.File(path, applyID3v2Hack=True)`
to ensure that MPEG files will always get updated to ID3v2 if
necessary. Use at your own risk!
- update documentation
- declare development stadium as "beta" since no critical bugs
seem to exist.

- fix integration into PyPI, clean up code & documentation

- add test script for python2.x/3.x