- added nearly all migration files

- added nearly all database seed files

database/migrations/2019_08_28_074630_create_roles_table.php

@@ -0,0 +1,79 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class CreateRolesTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        DB::beginTransaction();
+
+        // Create table for storing roles
+        Schema::create('roles', function (Blueprint $table) {
+            $table->increments('id');
+            $table->string('name', 255);
+            $table->string('display_name', 255)->nullable();
+            $table->string('description', 255)->nullable();
+            $table->nullableTimestamps();
+        });
+
+        // Create table for associating roles to accounts (Many-to-Many)
+        Schema::create('link_accounts_roles', function (Blueprint $table) {
+            $table->unsignedInteger('account_id')->unsigned();
+            $table->unsignedInteger('role_id')->unsigned();
+            
+            $table->foreign('account_id')
+            ->references('id')->on('accounts')
+            ->onDelete('cascade')->onUpdate('cascade');
+            $table->foreign('role_id')
+            ->references('id')->on('roles')
+            ->onDelete('cascade')->onUpdate('cascade');
+            
+            $table->primary(['account_id', 'role_id']);
+        });
+        
+        // Create table for storing permissions
+        Schema::create('permissions', function (Blueprint $table) {
+            $table->increments('id');
+            $table->string('name')->unique();
+            $table->string('display_name', 100);
+            $table->string('description', 255)->nullable();
+            $table->timestamps();
+        });
+
+        // Create table for associating permissions to roles (Many-to-Many)
+        Schema::create('role_has_permissions', function (Blueprint $table) {
+            $table->integer('permission_id')->unsigned();
+            $table->integer('role_id')->unsigned();
+
+            $table->foreign('permission_id')->references('id')->on('permissions')
+                ->onUpdate('cascade')->onDelete('cascade');
+            $table->foreign('role_id')->references('id')->on('roles')
+                ->onUpdate('cascade')->onDelete('cascade');
+
+            $table->primary(['permission_id', 'role_id']);
+        });
+
+        DB::commit();
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('role_has_permissions');
+        Schema::dropIfExists('permissions');
+        Schema::dropIfExists('link_accounts_roles');
+        Schema::dropIfExists('roles');
+    }
+}