New functionality for terrain editing

Hooray! ._ .

I’ve  implemented a function that can change the heigth of a map, very simply to use:

$MyAdt = new ADT();
$MyAdt->ADT_Open("../../maps/Azeroth_32_48 - copia.adt");
$MyAdt->ADT_HeaderInfo();
 
$MyAdt->ADT_Terrain_UP(35,"up");// or down!