Fixes to make SO login work. GitHub now works also (was a FF plugin bug)

database/migrations/2014_10_12_000000_create_users_table.php

@@ -16,7 +16,7 @@ class CreateUsersTable extends Migration
         Schema::create('users', function (Blueprint $table) {
             $table->increments('id');
 	        $table->timestamps();
-            $table->string('name');
+            $table->string('name')->unique();
             $table->string('email')->unique()->nullable();
             $table->string('password')->nullable();
             $table->rememberToken();