Port ExecutingDirectory from omfOS Util class.

OpenSim/Framework/Util.cs

@@ -91,6 +91,17 @@ namespace OpenSim.Framework
 
         public static FireAndForgetMethod FireAndForgetMethod = FireAndForgetMethod.SmartThreadPool;
 
+        /// <summary>
+        /// Gets the name of the directory where the current running executable
+        /// is located
+        /// </summary>
+        /// <returns>Filesystem path to the directory containing the current
+        /// executable</returns>
+        public static string ExecutingDirectory()
+        {
+            return Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
+        }
+
         /// <summary>
         /// Linear interpolates B<->C using percent A
         /// </summary>