lightbox2 5.x-2.5

Changes since DRUPAL-5--2-4:

• #222273 - added in support for class "image-img_assist_custom" so the anchor href attribute is used when the image is clicked on. Also added in support for invalid urls which contain the language (e.g. /en) prepended to them.
• #222273 (part 2) - made support for image assist custom size images configurable
• #219385 - change to separate out the info height from the border size.
• #223846 - fix for filter tips, patch provided by Takafumi
• #224773 - lightbox2 was displaying previously hidden select elements on end
• #226309 - fix for image_nodes.js serious error where one of the trigger sizes was "original".
• #222273 - fix for multi-lingual sites where the language string appears in the target image url and where the basePath is not '/'.
• #230000 - there's now the option of opening up the node link in a new window.
• #227671 - can now group imagefields by field name and node id (optional).
• Tidied up automatic settings page.
• Latest translation template file.