v1.3.0

• E1.31 sACN receiver mode - allows low-latency direct control of LEDs over the network and enables music visualization through LedFx and other control software
  
• Support for custom pixel mappings - for displaying animations on arbitrary 2D and 3D LED arrangements
• Pattern functions now receive 3D position instead of 2D - existing custom patterns will be upgraded automatically
• Improved performance and default speed settings for some built-in animation patterns
• Added palette_mirrored utility function
• Added animated GIF previews of all built-in animations to patterns.md
• Fix more minor issues with web interface