Removed has-binary-data dependency

And replaced it with better isBuf function. Has binary data would not have
checked objects that contain blobs. isBuf only checks the current object,
not its child objects

binary.js

@@ -3,7 +3,6 @@
  */
 
 var isArray = require('isarray');
-var hasBin = require('has-binary-data');
 
 /**
  * Replaces every Buffer | ArrayBuffer in packet with a numbered placeholder.
@@ -127,7 +126,7 @@ exports.removeBlobs = function(data, callback) {
       for (var i = 0; i < obj.length; i++) {
         removeBlobsRecursive(obj[i], i, obj);
       }
-    } else if (obj && 'object' == typeof obj && !hasBin(obj)) { // and object
+    } else if (obj && 'object' == typeof obj && !isBuf(obj)) { // and object
       for (var key in obj) {
         removeBlobsRecursive(obj[key], key, obj);
       }
@@ -140,4 +139,14 @@ exports.removeBlobs = function(data, callback) {
   if (!pendingBlobs) {
     callback(bloblessData);
   }
-}
+}
+
+/**
+ * Returns true if obj is a buffer or an arraybuffer.
+ *
+ * @api private
+ */
+function isBuf(obj) {
+  return (global.Buffer && Buffer.isBuffer(obj)) ||
+         (global.ArrayBuffer && obj instanceof ArrayBuffer);
+}