Use util.debuglog instead of using different indidivudal styles for debugging

examples/eval.js

@@ -3,8 +3,6 @@
 var redis = require("../index"),
     client = redis.createClient();
 
-redis.debug_mode = true;
-
 client.eval("return 100.5", 0, function (err, res) {
     console.dir(err);
     console.dir(res);

examples/psubscribe.js

@@ -7,8 +7,6 @@ var redis = require("redis"),
     client4 = redis.createClient(),
     msg_count = 0;
 
-redis.debug_mode = false;
-
 client1.on("psubscribe", function (pattern, count) {
     console.log("client1 psubscribed to " + pattern + ", " + count + " total subscriptions");
     client2.publish("channeltwo", "Me!");

examples/pub_sub.js

@@ -4,8 +4,6 @@ var redis = require("redis"),
     client1 = redis.createClient(), msg_count = 0,
     client2 = redis.createClient();
 
-redis.debug_mode = false;
-
 // Most clients probably don't do much on "subscribe".  This example uses it to coordinate things within one program.
 client1.on("subscribe", function (channel, count) {
     console.log("client1 subscribed to " + channel + ", " + count + " total subscriptions");