[Release] Updated Sun Positions and Lighting

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The sun positions in GTR2 aren't particularly accurate so I have taken the time to update them.

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Features:
Adjusted Latitude of tracks to be correct.
Race dates changed to what they were in 2003 and 2004.
North direction changed to be closer to what they would be in real life.
Optional adjusted lighting with a darker night.

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Notes:
Sun positions are not 100% accurate but a massive improvement on the default tracks.
Some tracks with how the latitude and race dates line up don't get very dark.
Default files are included if you no longer wish to use my changes.

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Thank You very much

Thank you

Looks good Aaron, thanks

Thank you!