o bug #374044: when editing group, don't display "create group" button

state.  The code is functional, but the underlying schema is still
likely to be changed with no upgrade path provided.  For more
information as to what's planned in the near future for this module
refer to the included documentation/TODO.txt file.

    * Written in PHP specifically for Drupal.
    * Highly configurable.
    * Simple installation.
    * Modular design allows easy addition of additional advertising
      formats.
    * Any number of configurable banner groups.
    * Comprehensive statistics allowing time-based reporting and
      analysis.
    * Tracks when ads are clicked, by which user, which IP, and where.
    * ad_image module supports banner and image-block ads.
    * ad_text module supports text ads.