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*15 Dec 2018*
- added new options:
- `--song`
- `--song-short`
- `--album`
- `--artist`
- `--artist-short`
- `--playback-status`
- extracted version to `spotifycli/version.py` file
- removed short options:
- `-h`
- `-v`
- added info about utf-8 encoding to the file header
- updated script shebang from `!/usr/bin/env python` to `!/usr/bin/python -u` due to problems with the script execution