Loading order of custom.css

First of all, thanks to Edison Wong for his great work!

In alpha4 version, custom.css file is loaded before layout-*.css.
Since custom.css could also contain layout customizations, I think it would be better to load it after layout-*.css.

To obtain such behavior, I have modified the original files as following:

diff interactive_media.info.original interactive_media.info
41c41
< stylesheets[all][]   = css/custom.css
---
> ; stylesheets[all][]   = css/custom.css ; custom.css has to be added as last file, template.php adds it after choosen layout css file.

diff template.php.original template.php
117c117
<   $vars['css'] = drupal_add_css();
---
>   $vars['css'] = drupal_add_css($directory . "custom.css", 'theme', 'all');