laravel/laravel — pull request #370 by cviebrock (2012-02-29 21:13:19+00:00)
Title: Add unsigned() modifier, so you can create unsigned integer columns.

This now allows you to do:

Schema::create('users',function($table)
{
$table->increments('id')->unsigned();
$table->string('email',128)->index();
$table->string('password',128);
$table->integer('group_id')->unsigned()->index();
});