Rewriting to follow Zen Cart Standards

Hi,
Although I really like your module, I think it could use some improvements, see the points below, which I changed.
-moving missing_images.php to admin folder
-removing (IMHO) the overcomplicated database connection, ZC already facilitates in this.
-Moving defines to language file
-moving css to separate file
-added standard zc admin page layout

todo:
There are still some hard coded texts which should be move to the language files, for the sake of multilingual stores.
As an extra option, the mod could be added to the zc admin menu, for easier running by a click, and maybe adding the optional error reporting switch to a config screen.