v1.6.0

• added equalizer per song option
• added custom text formatting for cassette (see USAGE.md)
• NW-A30 Walkman One compability
• increased sizes for most buttons making them easier to locate and tap
  • side effect: some of these buttons now require double tap, this is a bug
• various performance optimizations
• fixed volume table names (bluetooth -> balanced output)
• fixed wampy not showing up when cassette skin is on
• fixed cassette reel running at double speed when randomize mode is off
• fixed ascii characters without corresponding bitmap glyphs showing up in winamp marquee text
• fixed various build issues
• optimized documentation images
• updated documentation