added remaining LSL2 entities

LSL2/OIEVENT/WRITE/WO_MAT..json

@@ -0,0 +1,11 @@
+{
+    "header": {
+        "version": 1,
+        "type": "record"
+    },
+    "body": {
+        "record1": {
+            "<1>": "DECLARE SUBROUTINE ErrMsg\r\n\r\nErrMsg('This window may not be saved.')\r\n\r\nRETURN 0\r\n"
+        }
+    }
+}