Conditionally load CSS

Great plugin. Love how simple and fast it is!

Once very important suggestion.

I would recommend tweaking it so that the CSS file only loads if the shortcode is present or the code is selected to load (is_single etc).

You can very easily adapt some of the methods described here http://scribu.net/wordpress/optimal-script-loading.html

http://wordpress.org/plugins/juiz-social-post-sharer/