Add Request wrapper

To to have easy api for parameters

src/Xhgui/Request.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace XHGui;
+
+use Slim\Http\Request as SlimRequest;
+
+/**
+ * Class making it convenient to access request parameters
+ */
+class Request extends SlimRequest
+{
+    //checks _GET [IS PSR-7 compliant]
+    public function get(string $key)
+    {
+        return $this->getQueryParams()[$key];
+    }
+}