Added mp3 player which uses mediaelement-and-player.min.js library.
Added playlist to the player. It now plays the selected item when you click on the song in the playlist.
Added previous and next track buttons. Now the user can switch track.
added new icons and tweaked their position a little.
made it look like a real player. made the UI for full window. repositioned the buttons and made the song that is playing red in the playlist.
Added .gitignore with bunch of .mp3-files that shouldn't exist in any case