nEXT 3.6

New player system update [Issue #33]

Requirements

• Docker, docker-compose

What's changed

• Created Player, ServerController and Track classes
• Removed lists from COG
• Migrated to a new track-playing system
• User lists updated

• 3.6: update completed by @at-elcapitan in #34
  Full Changelog: v3.5.2...v3.6