Refactor and add importer to Installer module #443 (#444)

* Refactor and add importer to Installer module #443

* Refactor for finances to use in import

* Import groups into roles

* Formatting

* Formatting

* Add interface in installer for import

* Notes about importing

* Check for installer folder

* Formatting

* Fix pirep->user mapping

* Unused import

* Formatting

app/Contracts/Middleware.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace App\Contracts;
+
+use Closure;
+use Illuminate\Http\Request;
+
+interface Middleware
+{
+    public function handle(Request $request, Closure $next);
+}