Early Access Update v0.80 - Apr 2020 - Trophy Room

v0.80 changes
- added a Trophy Room and 3D modelled trophies so you can gaze upon your prizes up close
- added SplitscreenRace mode so players can race on a track of their choosing, previously you could only pick a cup to race in SplitscreenGP
- added an option to turn off the CPU karts in SplitscreenRace and SplitscreenGP
- added a track selection menu after a QuickRace so you don't have to return to the mainmenu
- redesigned some of the main menu to separate Single Player and Multiplayer game modes
- increased sideways friction stiffness on tyres to reduce sideways slippyness
- many many other fixes and improvements