Added Alien World Terrain Dataset to /bin/TerrainDatafiles (3x3)

bin/TerrainDatafiles/Alien/HOWTO.txt

@@ -0,0 +1,9 @@
+Use the "terrain load" command to import these datafiles.
+They are stored as Float-32 arrays, use the F32 import type.
+
+These files are formatted on a scale of 0 to 1, they are designed for a range of 0..58.81
+use the 'multiply' command to multiply them by 58.81 to achieve correct height values.
+
+Example ------------------
+Region# : terrain load f32 c:\opensim\datafiles\output_x0_y0.r32
+Region# : terrain multiply 58.81