Papyrus Nürburgring updates

Replaced KELLLAAA's (KE) asphalt/concrete textures with Dunky's textures.
Adjusted the 'KE' five different asphalt edging textures to match Dunky's asphalt textures.
All of 'KE' asphalt/concrete and edging textures renamed with *.m55 for 55Mod version.
Darkened the grass fringe underneath the regular armco and the Hohenrain Schikane (striped) armco.
Lowered the horizon by -500m using the 'moveable' horizon function.

(The MED-FB version is a step down from the HI-FB version. Primarily, it removes the hole at the beginning
of the back straight where the castle shows through the crowd of people. The things that are removed (trade offs)
by using this version: the long view back down the S/F straight on exiting the Südkehre is gone, the Bosch building
now 'clip-slides' towards you as you drive down the back straight, the track asphalt pops up at the end of the
back straight and finally, the castle and Mercedes tower only appear after you pass the back straight billboards.)

New back straight pit building textures, wire fence added and also corrected control tower side textures.
New south pits building object name, to allow separate textures between the north and south buildings.
Individual pit box upper advert naming for north pit building.
New textures for both south and north pit upper and lower adverts.
Updates to north pit adverts made by Nurby Yogi, then segmented and applied.

... and many, many more.
