- (allow deselect of all content types in exclude list)

 - cleaning up css classnames (use - rather than _ as a separator and prefix all css ids and classnames with 'directory-')
 - Adding diagnostic code (for future use)

directory_help:
 - Added version info and links to maintainer site.
 - Rewording settings text to help clarify proper usage.

directory_page:
 - Fixed problem where empty categories was not displaying "nothing in this category" text.

General:
 - cleaning up css classnames (use - rather than _ and prefix all with 'directory-')
 - Adding diagnostic code (for future use)

directory_help:
 - Added version info and links to maintainer site.
 - Rewording settings text to help clarify proper usage.

directory_page:
 - Fixed problem where empty categories was not displaying "nothing in this category" text.

  - directory_display_resource() : Fixes for 4.7.x  where no nodes were being shown.
  - directory_display_resource() : Optimization: Hoisted variable_get() out of loop
  - Added helper functions _first() and _last() to get first and last array elements

* Using vocabularies, create a directory-style listing of content, or even overlay vocabularies for a drill-down effect.  It needs some work, but you can see it in action at http://www.ent.iastate.edu/list/