Xymusictagger

- Implemented mutagen for mp3 files

- Removed Pytaglib

- Removed compiler script because they are useless

- Updated README

- Updated setup.py

- Updated .gitignore

- Updated .travis.yml

- Added AppVeyor integration

- Various fix

- Various fix

- Added [setup.py](setup.py)

- Added support for compilation with pyinstaller

- Added icon

- Added TravisCI integration

- Removed Pylast authentication because it's useless

- Added Genius integration

- Added LastFM integration