Gamepad Improvements: Round 2

See merge request KartKrew/Kart-Public!24

Fix rendering gaps on polys with upper/lower textures

See merge request KartKrew/Kart-Public!26

Partial revert of commit 92a60b32.

Meant to do this in song-credits, since individual songs are now properly credited there.

Update SOC version, make base SRB2 SOC throw a warning

See merge request KartKrew/Kart-Public!11

-noxinput command line parameter

See merge request KartKrew/Kart-Public!21

Should fix problems where Switch Pro controllers suddenly had their mappings changed. Does not recognize controllers connected before game launch. Make sure to replug your controller after the game launches if using this param.

Fix splitscreen being forced into oldchat

See merge request KartKrew/Kart-Public!25

In-game music credits

See merge request KartKrew/Kart-Public!23

Also attempts to fix the d-pad typing characters into the chat box.

KMD2 Fallback

See merge request KartKrew/Kart-Public!22

Dunno if this works or not yet!

Very rudimentary at the moment, but it's workable

Implement OSX and Debian installer building for Travis

See merge request KartKrew/Kart-Public!8

Minimum speed to get drift sparks

See merge request KartKrew/Kart-Public!20

Add Windows installer building and 64-bit builds to AppVeyor

See merge request KartKrew/Kart-Public!7