Playlist, adding files to playlist, playlist playback
Introducing Model/View based playlist
Previous functionality on Model/View design pattern
add TagExtractor class for ID3 tags support
title of the song is displayed in playlist instead of filename
Added displaying of 4 ID3 tags in playlist
added duration field to playlist with proper time display
Added leading zero to seconds in playlist
Added Playing field and marker
Changed playlist row height and added if file path from file dialog is valid
Fixed bug #4
Added playing selected song by double clicking it on playlist
Fixed issue #3