[TiM's osC Solutions] Better image uploa

for osCommerce Online Merchant v2.2

* Resampling Larger uploaded product images will be resampled for best fit within 1024 x 1024 pixels (Adjustable in admin panel). * Multiple product images Upload almost an unlimited amount of extra product images. * Dedicated folder for product images Uploads new product images to a separate folder. (catalog/images becomes catalog/images/products instead.) * SEO filenames Saves new product images by SEO friendly filename (Ex. 451-iPod_nano.jpg) instead of wacky original filenames. * Watermarking Easily enable watermarking for all uploaded product images through admin panel. * Flag temporary uploads Names uploaded product images as temp files until changes are confirmed (i.e. _tmp923467897.jpg). That way orphan images from canceled changes can easily be deleted in catalog/images/products/. Caution! This may collide with other image management contributions.