Improve kernel constructor to respect kernelspec args

Author: anutosh491

include/xeus-lite/xembind.hpp

@@ -41,16 +41,18 @@ namespace xeus
     xeus::xserver * get_server(xeus::xkernel * kernel);
 
     template<class interpreter_type>
-    std::unique_ptr<xkernel> make_xkernel()
+    std::unique_ptr<xkernel> make_xkernel(ems::val js_argv)
     {
         xeus::xconfiguration config;
 
         using history_manager_ptr = std::unique_ptr<xeus::xhistory_manager>;
         history_manager_ptr hist = xeus::make_in_memory_history_manager();
 
-        using interpreter_ptr = std::unique_ptr<interpreter_type>;
-        
-        auto interpreter = interpreter_ptr(new interpreter_type());
+        std::vector<std::string> args = ems::vecFromJSArray<std::string>(js_argv);
+
+        std::unique_ptr<interpreter_type> interpreter;
+        interpreter = std::make_unique<interpreter_type>(args);
+
         auto context = std::make_unique<xeus::xcontext_impl<empty_context_tag>>();
 
         xeus::xkernel * kernel = new xeus::xkernel(config,