The Custom Kart Parts update

• Added Gold Mantis Kart. (by Tomix)
• Added Arcade Kart. (by Yawshi)
• Added MKDS Monster Tires. (by Tomix)
• Updated Green/Red eggs to latest version.
• Added cc modifier plugin.
• Added 11.3 support and updated NTR to ver. 3.4 Preview6 (thanks to cell9 & Nanquitas)
• Removed LED tricks plugin (was only a POC)