Sliding images gallery

The module is based on the jQuery tutorial "Sliding Boxes and Captions with jQuery" from Sam Dunn. (http://buildinternet.com/2009/03/sliding-boxes-and-captions-with-jquery/) and implements a simple image gallery allowing to replace with a sliding effect the initial picture by another one on hovering. It supports multiple uses on the same page or on several pages by defining a unique id for each module . Module allows to define following settings: * images folder * gallery alignment: left or centered * gallery parameters: width, height and background color ans css, number of rows and number of images per row * image box parameters: width, height, margin, css * gallery sliding effect (vertical, horizontal and diagonal) and duration * max 16 images: images file names (initial, on hovering), url and target Changelog V1.0 - 21 March 2011: inital release of J1.5 version