Added models, migrations and controllers

This commit adds the logical structure for the app.

database/migrations/2020_04_29_022402_create_applications_table.php

@@ -0,0 +1,45 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreateApplicationsTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        /*
+         * One user can have one application, and one application can only have one user
+         * One form may have multiple responses, but a response may only have one form
+         * One application may only have one form response, but a response can have many applications
+         */
+        Schema::create('applications', function (Blueprint $table) {
+            $table->id();
+            $table->bigIncrements('applicantUserID'); // 1-1
+            $table->bigIncrements('applicantFormResponseID'); // 1-*
+            $table->enum('applicationStatus', [
+                'STAGE_SUBMITTED',
+                'STAGE_PEERAPPROVAL',
+                'STAGE_INTERVIEW',
+                'APPROVED',
+                'DENIED'
+            ]);
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('applications');
+    }
+}