A MPD client in Rust

### Keys
- `q` OR 'Ctr+C' to quit
- `p` to toggle pause
- `+` to increase volume
- `-` to decrease volume
- `D` to get dmenu prompt
- `j` to scroll down
- `k` to scroll up
- `l` add song to playlist or go inside the directory
- `h` to go back to previous directory
- `Tab` to cycle through tabs
- `1` to go to directory tree
- `2` to go to current playing queue
- `3` to go to playlists view
- `Enter` to add song/playlist to current playlist
- `a` to append the song to current playing queue
- `f` to go forward
- `b` to go backwords
- `>` to play next song from queue
- `<` to play previous song from queue
- `U` to update the MPD database