Added some new code to implement a permission scheme.

database/migrations/2015_05_28_041652_entrust_setup_tables.php

@@ -0,0 +1,74 @@
+<?php
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+
+/**
+ * Class EntrustSetupTables
+ */
+class EntrustSetupTables extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return  void
+     */
+    public function up()
+    {
+        // Create table for storing roles
+        Schema::create('roles', function (Blueprint $table) {
+            $table->increments('id');
+            $table->string('name')->unique();
+            $table->string('display_name')->nullable();
+            $table->string('description')->nullable();
+            $table->timestamps();
+        });
+
+        // Create table for associating roles to users (Many-to-Many)
+        Schema::create('role_user', function (Blueprint $table) {
+            $table->integer('user_id')->unsigned();
+            $table->integer('role_id')->unsigned();
+
+            $table->foreign('user_id')->references('id')->on('users')
+                ->onUpdate('cascade')->onDelete('cascade');
+            $table->foreign('role_id')->references('id')->on('roles')
+                ->onUpdate('cascade')->onDelete('cascade');
+
+            $table->primary(['user_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')->nullable();
+            $table->string('description')->nullable();
+            $table->timestamps();
+        });
+
+        // Create table for associating permissions to roles (Many-to-Many)
+        Schema::create('permission_role', 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']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return  void
+     */
+    public function down()
+    {
+        Schema::drop('permission_role');
+        Schema::drop('permissions');
+        Schema::drop('role_user');
+        Schema::drop('roles');
+    }
+}