iFit/read

 Read d1d object from a file or array of d1d objects from a set of files
 
   >> w=read(d1d,file)

 Need to give first argument as an d1d object to enforce a call to this function.
 Can simply create a dummy object with a call to d1d:
    e.g. >> w = read(d1d,'c:\temp\my_file.d1d')

 Input:
 -----
   d1d         Dummy d1d object to enforce the execution of this method.
               Can simply create a dummy object with a call to d1d:
                   e.g. >> w = read(d1d,'c:\temp\my_file.d1d')

   file        File name, or cell array of file names. In this case, reads
               into an array of d1d objects

 Output:
 -------
   w           d1d object, or array of d1d objects if given cell array of
               file names