Change license placement/usage

I'm proposing to choose other license distribution format:

1. place short reference on top of each file with software name and place where to look for a license
2. place actual license code in LICENSE file, that we're shipping with In-Portal anyway

Example license format:

/**
 * This file is part of the In-Portal CMS.
 * For the full copyright and license information, please view
 * the LICENSE file that was distributed with this source code.
 *
 * @copyright Intechnic Corporation
 * @link      http://www.in-portal.com/download.html
 */

Depending on a file we'll be adding extra @package line to the license.