Add support for the node net module.

frog/minfrog

Index: frog/minfrog
===================================================================
--- frog/minfrog	(revision 3380)
+++ frog/minfrog	(working copy)
@@ -2304,10 +2304,26 @@
 path = require('path');
 // ********** Code for top level **************
 function createSandbox() {
-  return {'require': require, 'process': process, 'console': console,
+  return {
+        'require': require,
+        'process': process,
+        'console': console,
         'Buffer' : Buffer,
-        'setTimeout': setTimeout, 'clearTimeout': clearTimeout};
+        'setTimeout': setTimeout,
+        'clearTimeout': clearTimeout,
+        'ArrayBuffer': ArrayBuffer,
+        'Int8Array': Int8Array,
+        'Uint8Array': Uint8Array,
+        'Int16Array': Int16Array,
+        'Uint16Array': Uint16Array,
+        'Int32Array': Int32Array,
+        'Uint32Array': Uint32Array,
+        'Float32Array': Float32Array,
+        'Float64Array': Float64Array,
+        'DataView': DataView
+        };
 }
+
 function get$_process() {
   return process;
 }