- Adding data-lightbox-image attribute.
- Checks data-lightbox-href/href/src for a URL that links to an image.
- Puts url in img tag.
- Wraps img with .lightbox-image div.

- Was causing "undefined variable" notice.

- Old 'ids' element is deprecated.

- Do not hard-code base path for future AJAX compatibility
- Add support for empty lists

- Fixes problems related to symlinks.

- In smaller screen sizes, display a button to expand the sidebar instead of having a wide border.

- Also begin checking a root /xsl directory in preparation for possible future reorganization away from modules.

- Old ID-based method was based on lack of confidence and added unnecessary complexity.
- Removing dependency on IDs will allow future simplification of the browse handler.