node: NodeBuffer -> Buffer. Mark NodeBuffer as deprecated

buffer-equal/buffer-equal-tests.ts

@@ -3,6 +3,6 @@
 import bufferEqual = require('buffer-equal');
 
 var bool: boolean;
-var buf: NodeBuffer;
+var buf: Buffer;
 
 bool = bufferEqual(buf, buf);

buffer-equal/buffer-equal.d.ts

@@ -6,6 +6,6 @@
 /// <reference path="../node/node.d.ts" />
 
 declare module 'buffer-equal' {
-	function bufferEqual(actual:NodeBuffer, expected:NodeBuffer): boolean;
+	function bufferEqual(actual:Buffer, expected:Buffer): boolean;
 	export = bufferEqual;
 }