Pytify

* Add playing song to toolbar
* Update prompt colors
* Better error handling for the auth

Must authorize in order to search for songs

The commander enriches the search with commands which enables us to perform different operations without leaving the search field.


- Simplify search string
- Updated short keys
- Large parts of curses rewritten
- Dbus interface factory
- Get current playing song with `pytify -c`
- Add meta data dbus class
- Absolute imports
- Unicode literals
- Add application name, version and repo to the cli
- Update license

- Tab completion
- Minor refactoring

- Search history
- Auto suggest
- Refactor
- No Python 2 support