Organize examples.

examples/file.js

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+// Read a file from disk, store it in Redis, then read it back from Redis.
+
+var redis = require("redis"),
+    client = redis.createClient(),
+    fs = require("fs"),
+    filename = "kids_in_cart.jpg";
+
+// Get the file I use for testing like this:
+//    curl http://ranney.com/kids_in_cart.jpg -o kids_in_cart.jpg
+// or just use your own file.
+
+// Read a file from fs, store it in Redis, get it back from Redis, write it back to fs.
+fs.readFile(filename, function (err, data) {
+    if (err) throw err
+    console.log("Read " + data.length + " bytes from filesystem.");
+    
+    client.set(filename, data, redis.print); // set entire file
+    client.get(filename, function (err, reply) { // get entire file
+        if (err) {
+            console.log("Get error: " + err);
+        } else {
+            fs.writeFile("duplicate_" + filename, reply, function (err) {
+                if (err) {
+                    console.log("Error on write: " + err)
+                } else {
+                    console.log("File written.");
+                }
+                client.end();
+            });
+        }
+    });
+});