FindDirectory:

--------------------------------------------------------------------------
   Returns the path to a directory.
--------------------------------------------------------------------------
   Form:
   p = FindDirectory( d )
--------------------------------------------------------------------------

   ------
   Inputs
   ------
   d        (1,:) Name of the directory

   -------
   Outputs
   -------
   p        (1,:) Path to the files in the directory OR
            {:}   Cell array of paths if 'all' option is specified

--------------------------------------------------------------------------