<?php 

add_theme_support( 'automatic-feed-links' );
if ( ! isset( $content_width ) ) $content_width = 900;

add_action('widgets_init' , 'theme_slug_widgets_init');
function theme_slug_widgets_init(){
	register_sidebar(array(
	'name' => 'Arta Main Sidebar',
	'id' => 'arta_main_sidebar',
	)
	);
}

?>