Move all nodes into core subdirectory

This makes it easier to distinguish core nodes from those added later

nodes/core/storage/28-tail.js

@@ -0,0 +1,56 @@
+/**
+ * Copyright 2013 IBM Corp.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ **/
+
+var RED = require(process.env.NODE_RED_HOME+"/red/red");
+var fs = require("fs");
+var spawn = require('child_process').spawn;
+
+function TailNode(n) {
+    RED.nodes.createNode(this,n);
+
+    this.filename = n.filename;
+    this.split = n.split;
+    var node = this;
+
+    var err = "";
+    var tail = spawn("tail", ["-f", this.filename]);
+    tail.stdout.on("data", function (data) {
+        var msg = {topic:node.filename};
+        if (node.split) {
+            var strings = data.toString().split("\n");
+            for (s in strings) {
+                if (strings[s] != "") {
+                    msg.payload = strings[s];
+                    node.send(msg);
+                }
+            }
+        }
+        else {
+            msg.payload = data.toString();
+            node.send(msg);
+        }
+    });
+
+    tail.stderr.on("data", function(data) {
+        node.warn(data.toString());
+    });
+
+    this.on("close", function() {
+        if (tail) tail.kill();
+    });
+}
+
+RED.nodes.registerType("tail",TailNode);