* Made new Framework.Constants class, added RegionSize member.

* Converted all instances of "256" spotted to use RegionSize instead. Some approximations used for border crossings (ie 255.9f) are still using that value, but should be updated to use something based on RegionSize.
* Moving Terrain to a RegionModule, implemented ITerrainChannel and TerrainModule - nonfunctional, but will be soon.

OpenSim/Region/Environment/Interfaces/ITerrainChannel.cs

@@ -0,0 +1,10 @@
+using System;
+namespace OpenSim.Region.Environment.Interfaces
+{
+    interface ITerrainChannel
+    {
+        int Height { get; }
+        double this[int x, int y] { get; set; }
+        int Width { get; }
+    }
+}