Small Improvements

Hi @abuhayat!

Thanks for that little sweet plugin ??

I added some options and want to share it:

1. lang (short language code e.g. en|de|ja)
2. chrome (noheader nofooter noborders noscrollbar transparent)
3. limit (limits the number of tweets [1-20])
4. optout (true = do not track)

and I also added rel=”nofollow” to the a href element.

// Shortcode for Timeline
function etf_shortcode_func($atts){
	extract( shortcode_atts( array(
		'username' => null,
		'width' => null,
		'height' => null,				
		'theme' => 'dark',
		'title' => null,
		'lang' => 'de',		
		'chrome' => null,
		'limit' => null,
		'optout' => null,
	), $atts ) );
?>
<?php ob_start();?>	
<?php if (!empty($username)){ ?>
<a class="twitter-timeline" data-theme="<?php echo $theme; ?>" href="https://twitter.com/<?php echo $username; ?>" data-tweet-limit="<?php echo $tweet-limit; ?>" data-chrome="<?php echo $chrome; ?>" data-lang="<?php echo $lang; ?>" data-dnt="<?php echo $optout; ?>" rel="nofollow"><?php echo $title; ?> <?php echo $username; ?></a> 
<?php }else{ echo '<h2>You must enter your Twitter handle in the username attribute of the shortcode.  </h2>';}
$output = ob_get_clean();return $output;
}
add_shortcode('timeline','etf_shortcode_func');