Copy sandbox options when recursing

Fixes #41

Author: Oliver Joseph Ash

lib/sandboxed_module.js

@@ -159,13 +159,14 @@ SandboxedModule.prototype._createRecursiveRequireProxy = function() {
   }
   cache[this.filename] = this.exports;
   var globals = this.globals;
+  var options = this._options;
 
   function createInnerSandboxedModule(requestedFilename){
       // load nested dependency in sandboxed module
       var sandboxedModule = new SandboxedModule();
       sandboxedModule._getGlobals = function(){return globals};
       var trace = stackTrace.get(createInnerSandboxedModule);
-      sandboxedModule._init(requestedFilename,trace);
+      sandboxedModule._init(requestedFilename,trace,options);
       var proxyRequire = bindRequire(RecursiveRequireProxy,sandboxedModule);
       sandboxedModule.locals.require = proxyRequire;
       sandboxedModule.module.require = proxyRequire