Logger Class Implemented

Allows log files to be written for debugging purposes.

For instance if you are creating a class then:
```php
<?php
/**
 * Class to Implement Logger for debugging :)
 *
 * @class       Test_AB_Logger
 * @package     AxisBuilder/Demo
 * @category    Class
 * @author      AxisThemes
 * @since       1.0.0
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly
}

/**
 * Test_AB_Logger Class
 */
class Test_AB_Logger {

	/**
	 * Language repository
	 *
	 * @var string
	 */
	protected $repo = 'https://github.com/axisthemes/axis-builder-language-packs/raw/v';

	/**
	 * Class Constructor Method.
	 */
	public function __construct() {
		add_filter( 'admin_init', array( $this, 'get_logging' ), 999 );
	}

	/**
	 * Get the language package URI.
	 *
	 * @return string
	 */
	public function get_language_package_uri() {
		return $this->repo . AB_VERSION . '/packages/' . get_locale() . '.zip';
	}

	public function get_logging() {
		$this->log = new AB_Logger();
		$this->log->add( 'test_log', $this->get_language_package_uri() ); // Filename, Content to output :)
	}
}

return new Test_AB_Logger();
```
Only you need to be sure is include this class via `axis-builder.php` init hook as `AB_Logger` is defined there :)