Some complex re-ordering to make prebuild do what needed to be done.

It is now possible to use module interfaces without referencing Scene.
Place those interfaces in OpenSim/Region/Interfaces. They may not
use any refs from OpenSim.Region.Environment as parameters.
This resolves a circular library ref introduced in r5949

OpenSim/Framework/Communications/Capabilities/Caps.cs

@@ -35,8 +35,7 @@ using log4net;
 using OpenSim.Framework.Communications.Cache;
 using OpenSim.Framework.Servers;
 using OpenSim.Framework;
-using OpenSim.Region.Environment.Interfaces;
+using OpenSim.Region.Interfaces;
-using OpenSim.Region.Environment.Scenes;
 
 namespace OpenSim.Framework.Communications.Capabilities
 {
@@ -614,7 +613,7 @@ namespace OpenSim.Framework.Communications.Capabilities
                 llsdRequest.asset_type == "sound")
             {
                 IClientAPI client = GetClient(m_agentID);
-                Scene scene = (Scene)client.Scene;
+                IScene scene = client.Scene;
 
                 IMoneyModule mm = scene.RequestModuleInterface<IMoneyModule>();
 

OpenSim/Framework/IScene.cs

@@ -63,5 +63,7 @@ namespace OpenSim.Framework
         bool PresenceChildStatus(LLUUID avatarID);
 
         string GetCapsPath(LLUUID agentId);
+
+        T RequestModuleInterface<T>();
     }
-}
+}

OpenSim/Region/Environment/Modules/Agent/AssetTransaction/AssetTransactionModule.cs

@@ -32,6 +32,7 @@ using libsecondlife;
 using log4net;
 using Nini.Config;
 using OpenSim.Framework;
+using OpenSim.Region.Interfaces;
 using OpenSim.Region.Environment.Interfaces;
 using OpenSim.Region.Environment.Scenes;
 

OpenSim/Region/Environment/Modules/Avatar/Currency/SampleMoney/SampleMoneyModule.cs

@@ -38,6 +38,7 @@ using Nini.Config;
 using Nwc.XmlRpc;
 using OpenSim.Framework;
 using OpenSim.Region.Environment.Interfaces;
+using OpenSim.Region.Interfaces;
 using OpenSim.Region.Environment.Scenes;
 using OpenSim.Framework.Communications.Cache;
 
@@ -54,7 +55,7 @@ namespace OpenSim.Region.Environment.Modules.Avatar.Currency.SampleMoney
     /// Centralized grid structure example using OpenSimWi Redux revision 9+
     /// svn co https://opensimwiredux.svn.sourceforge.net/svnroot/opensimwiredux
     /// </summary>
-    public class SampleMoneyModule : IMoneyModule
+    public class SampleMoneyModule : IMoneyModule, IRegionModule
     {
         private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
 

OpenSim/Region/Environment/Scenes/Scene.Inventory.cs

@@ -35,6 +35,7 @@ using libsecondlife.Packets;
 using log4net;
 using OpenSim.Framework;
 using OpenSim.Framework.Communications.Cache;
+using OpenSim.Region.Interfaces;
 using OpenSim.Region.Environment.Interfaces;
 
 namespace OpenSim.Region.Environment.Scenes

OpenSim/Region/Environment/Scenes/Scene.cs

@@ -2963,7 +2963,7 @@ namespace OpenSim.Region.Environment.Scenes
         /// For the given interface, retrieve the region module which implements it.
         /// </summary>
         /// <returns>null if there is no module implementing that interface</returns>
-        public T RequestModuleInterface<T>()
+        public override T RequestModuleInterface<T>()
         {
             if (ModuleInterfaces.ContainsKey(typeof(T)))
             {

OpenSim/Region/Environment/Scenes/SceneBase.cs

@@ -220,5 +220,10 @@ namespace OpenSim.Region.Environment.Scenes
 
             return null;
         }
+
+        public virtual T RequestModuleInterface<T>()
+        {
+            return default(T);
+        }
     }
 }

OpenSim/Region/Interfaces/IMoneyModule.cs

@@ -29,10 +29,10 @@ using System;
 using OpenSim.Framework;
 using libsecondlife;
 
-namespace OpenSim.Region.Environment.Interfaces
+namespace OpenSim.Region.Interfaces
 {
     public delegate void ObjectPaid(LLUUID objectID, LLUUID agentID, int amount);
-    public interface IMoneyModule : IRegionModule
+    public interface IMoneyModule
     {
         bool ObjectGiveMoney(LLUUID objectID, LLUUID fromID, LLUUID toID,
                 int amount);

OpenSim/Region/ScriptEngine/Common/LSL_BuiltIn_Commands.cs

@@ -38,6 +38,7 @@ using libsecondlife.Packets;
 using OpenSim.Framework;
 using OpenSim.Framework.Communications.Cache;
 using OpenSim.Region.Environment;
+using OpenSim.Region.Interfaces;
 using OpenSim.Region.Environment.Interfaces;
 using OpenSim.Region.Environment.Modules.Avatar.Currency.SampleMoney;
 using OpenSim.Region.Environment.Modules.World.Land;

OpenSim/Region/ScriptEngine/Common/ScriptEngineBase/EventManager.cs

@@ -31,6 +31,7 @@ using libsecondlife;
 using OpenSim.Framework;
 using OpenSim.Region.Environment.Modules.Avatar.Currency.SampleMoney;
 using OpenSim.Region.Environment;
+using OpenSim.Region.Interfaces;
 using OpenSim.Region;
 using OpenSim.Region.Environment.Scenes;
 using OpenSim.Region.Environment.Interfaces;

OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs

@@ -39,6 +39,7 @@ using OpenSim;
 using OpenSim.Framework;
 using OpenSim.Framework.Communications.Cache;
 using OpenSim.Region.Environment;
+using OpenSim.Region.Interfaces;
 using OpenSim.Region.Environment.Interfaces;
 using OpenSim.Region.Environment.Modules.Avatar.Currency.SampleMoney;
 using OpenSim.Region.Environment.Modules.World.Land;

OpenSim/Region/ScriptEngine/XEngine/EventManager.cs

@@ -31,6 +31,7 @@ using System.Collections.Generic;
 using libsecondlife;
 using OpenSim.Framework;
 using OpenSim.Region.Environment.Modules.Avatar.Currency.SampleMoney;
+using OpenSim.Region.Interfaces;
 using OpenSim.Region.Environment.Scenes;
 using OpenSim.Region.Environment.Interfaces;
 using OpenSim.Region.ScriptEngine.Shared;

prebuild.xml

@@ -650,6 +650,29 @@
       </Files>
     </Project>
 
+    <Project name="OpenSim.Region.Interfaces" path="OpenSim/Region/Interfaces" type="Library">
+      <Configuration name="Debug">
+        <Options>
+          <OutputPath>../../../bin/</OutputPath>
+        </Options>
+      </Configuration>
+      <Configuration name="Release">
+        <Options>
+          <OutputPath>../../../bin/</OutputPath>
+        </Options>
+      </Configuration>
+
+      <ReferencePath>../../../bin/</ReferencePath>
+      <Reference name="System" localCopy="false"/>
+      <Reference name="System.Runtime.Remoting"/>
+      <Reference name="OpenSim.Framework"/>
+      <Reference name="libsecondlife.dll"/>
+
+      <Files>
+        <Match pattern="*.cs" recurse="true"/>
+      </Files>
+    </Project>
+
     <!-- OpenSim.Framework.Communications -->
     <Project name="OpenSim.Framework.Communications" path="OpenSim/Framework/Communications" type="Library">
       <Configuration name="Debug">
@@ -668,12 +691,12 @@
       <Reference name="System.Xml"/>
       <Reference name="System.Web"/>
       <Reference name="OpenSim.Framework"/>
-      <Reference name="OpenSim.Region.Environment"/>
       <Reference name="OpenSim.Framework.AssetLoader.Filesystem"/>
       <Reference name="OpenSim.Data" />
       <Reference name="OpenSim.Framework.Servers"/>
       <Reference name="OpenSim.Framework.Console"/>
       <Reference name="OpenSim.Framework.Statistics"/>
+      <Reference name="OpenSim.Region.Interfaces"/>
       <Reference name="libsecondlife.dll"/>
       <Reference name="Nini.dll" />
       <Reference name="XMLRPC.dll"/>
@@ -768,6 +791,7 @@
       <Reference name="Axiom.MathLib.dll"/>
       <Reference name="OpenSim.Framework"/>
       <Reference name="OpenSim.Data" />
+      <Reference name="OpenSim.Region.Interfaces" />
       <Reference name="OpenSim.Framework.Console"/>
       <Reference name="OpenSim.Framework.Servers"/>
       <Reference name="OpenSim.Framework.Statistics"/>
@@ -1575,6 +1599,7 @@
       <Reference name="OpenSim" />
       <Reference name="OpenSim.Framework"/>
       <Reference name="OpenSim.Framework.Communications"/>
+      <Reference name="OpenSim.Region.Interfaces" />
       <Reference name="OpenSim.Region.Environment" />
       <Reference name="OpenSim.Region.Physics.Manager" />
       <Reference name="OpenSim.Framework.Console"/>
@@ -1665,6 +1690,7 @@
       <Reference name="OpenSim" />
       <Reference name="OpenSim.Framework"/>
       <Reference name="OpenSim.Framework.Communications"/>
+      <Reference name="OpenSim.Region.Interfaces" />
       <Reference name="OpenSim.Region.Environment" />
       <Reference name="OpenSim.Framework.Console"/>
       <Reference name="OpenSim.Region.ScriptEngine.Shared"/>
@@ -1888,6 +1914,7 @@
       <Reference name="OpenSim.Framework"/>
       <Reference name="OpenSim.Framework.Communications"/>
       <Reference name="OpenSim.Region.Environment" />
+      <Reference name="OpenSim.Region.Interfaces" />
       <Reference name="OpenSim.Region.Physics.Manager" />
       <Reference name="OpenSim.Framework.Console"/>
       <Reference name="Axiom.MathLib.dll" localCopy="false"/>