added remaining LSL2 entities

LSL2/OIEVENT/CREATE/ABOUT..json

@@ -0,0 +1,11 @@
+{
+    "header": {
+        "version": 1,
+        "type": "record"
+    },
+    "body": {
+        "record1": {
+            "<1>": "declare function center_window\r\n\r\nif index( CreateParam, 'CENTER', 1 ) then\r\n    void = center_window( @window )\r\nend else\r\n    Void = set_property( @window, 'VISIBLE', 1 )\r\nend\r\nRETURN 0"
+        }
+    }
+}