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