DRY up requireEverything, make it lazy

lib/index.js

@@ -53,28 +53,16 @@ batteries.extendNative = function(context) {
   return batteries;
 };
 
+var NodeModules = ( 'assert buffer child_process crypto dgram dns events freelist'
+                  + ' fs http https net os path querystring readline repl'
+                  + ' string_decoder util url'
+                  ).split(' ');
+
 batteries.requireEverything = function(context) {
   context = ensureContext(context);
-  context.assert = require('assert');
-  context.buffer = require('buffer');
-  context.child_process = require('child_process');
-  context.crypto = require('crypto');
-  context.dgram = require('dgram');
-  context.dns = require('dns');
-  context.events = require('events');
-  context.freelist = require('freelist');
-  context.fs = require('fs');
-  context.http = require('http');
-  context.https = require('https');
-  context.net = require('net');
-  context.os = require('os');
-  context.path = require('path');
-  context.querystring = require('querystring');
-  context.readline = require('readline');
-  context.repl = require('repl');
-  context.string_decoder = require('string_decoder');
-  context.util = require('util');
-  context.url = require('url');
+  NodeModules.forEach(function(name) {
+    defineLazyProperty(context, name, function() { return require(name); });
+  });
 
   return batteries;
 };