update users

database/migrations/2014_10_12_000000_create_users_table.php

@@ -20,6 +20,7 @@ class CreateUsersTable extends Migration
             $table->string('email')->unique();
             $table->timestamp('email_verified_at')->nullable();
             $table->string('password');
+            $table->boolean('is_admin');
             $table->rememberToken();
             $table->timestamps();
             $table->softDeletes();