Revert "Fixed issue which caused .demand function not to work correct…

…ly."

This reverts commit 6509e5e.

index.js

@@ -12,17 +12,9 @@ var wordwrap = require('./lib/wordwrap');
 
 var inst = Argv(process.argv.slice(2));
 Object.keys(inst).forEach(function (key) {
-    if (key === 'argv') {
-        Object.defineProperty(Argv, 'argv', {
-            get: function() { return inst.argv; },
-            enumerable: true,
-        });
-    }
-    else {
-        Argv[key] = typeof inst[key] == 'function'
-            ? inst[key].bind(inst)
-            : inst[key];
-    }
+    Argv[key] = typeof inst[key] == 'function'
+        ? inst[key].bind(inst)
+        : inst[key];
 });
 
 var exports = module.exports = Argv;