Suzukitto (Suzuka variations) 1.3

- mountain textures changed by Mascot
- ext config SHADER_REPLACEMENTS by LuisB and Mascot

- fixed the crowd (in air) dropped to the stand
_ replaced GP map by @RMi_woods

- Rearranged the mountain shader with background textures.
- Added more trees
- Rearranged the settings for trees
- Replaced texture from TREEF
- Replaced the loading screens.