Changed references to wp-content

Hi,

I've used your plugin on a couple of projects recently and it's been quite useful. On most of my WP setups I change the wp-content folder name to something more custom to reduce the risk of hacking via brute force attacks. However certain references to that folder are hardcoded within the code so certain images break.

To stop that happening I've just modified the code slightly to reference whatever that folder is actually called.

I hope that helps. If you have any questions let me know.

Thanks,

Cliff