LDM filestrip plug-in.

- upload the contents of the clientscript directory if you want to enable the ajax feature
(this repaints just the filmstrip rather than the whole page)
- upload the contents of the icon directory into your LDM icons directory
- extra uses the links_filmstrip template as placeholder for the strip

When user displays a single entry within a category, plugin constructs
a filmstrip of neighbouring entries across the top of the display.

In other words, to get this to work, you must select a template_linkbit (e.g. photo, title) that takes 
you from the full listing to an individual entry.  This plugin has no effect with the
standard modern/tabular linkbits.

Parameters controlling the filmstrip are set via the LDM admin/settings page:
- Active/inactive
- Number of entries to show in total (default 5)
- Number of entries to show per row (default 5)
- Linkbit used for entry display (default links_linkbit_photo)
- Location on page