This mod uses a modified version of progs_dump.  Source is available at

https://github.com/4LT/progs_dump

In compliance with GPL, these modifications are also licensed under version 2 of
the GPL.

Changes:

 * New entities that wound up being unused

   * fx_model_toggle - Toggles between 2 different models.

   * fx_model_train - Model that follows a path.  Behaviorally a bit different
   from misc_modeltrain, but otherwise redundant.

 * Updated trigger_setskill to be triggerable by other entities (e.g. buttons)
