Aegean Race Track 1.3

Because it was my first mod, there was a time bomb that i didn't know in the json files that file path related.

I figured out the problems and tried to reduce the file size while fixing it, I managed to reduce the total size by at least 100 mb.

I hope there will be no such problems for a while.

-starting line added

-No texture errors fixed
-Billboards added
-Asphalt updated
-Groundcover updated
-Clouds rearranged
-Thumbnails updated

-terrain updated
-grass added
-time trial fixed (with help of @V1rginie )

-missing terrain fixed
-map info and pictures fixed