Added logging to the script engine and the associated properties in openspace.cfg table. Fixed comment for PropertyDocumentation in scene.cpp

openspace.cfg

@@ -52,6 +52,10 @@ return {
         Type = "text",
         File = "${BASE_PATH}/Properties.txt"
     },
+    ScriptLogFile = {
+        Type = "text",
+        File = "${BASE_PATH}/ScriptLog.txt"
+    },
     DownloadRequestURL = "http://openspace.itn.liu.se/request.cgi",
     RenderingMethod = "Framebuffer"
     --RenderingMethod = "ABuffer" -- alternative: "Framebuffer"