* Consolidated adding / removing ClientManager IClientAPIs to two places in Scene

* Added some missing implementations of IClientAPI.RemoteEndPoint
* Added a ClientManager.Remove(UUID) overload
* Removed a reference to a missing project from prebuild.xml

OpenSim/Tests/Common/Mock/TestClient.cs

@@ -393,6 +393,11 @@ namespace OpenSim.Tests.Common.Mock
             set { m_circuitCode = value; }
         }
 
+        public IPEndPoint RemoteEndPoint
+        {
+            get { return new IPEndPoint(IPAddress.Loopback, (ushort)m_circuitCode); }
+        }
+
         /// <summary>
         /// Constructor
         /// </summary>