coyote: CGWHOCALLEDME

Description
This is a function that will identify the caller of the program module
that contains this funciton.
Categories
Utilities
Returns
This function returns a string in uppercase letters identifying the caller 
of the program module from which this program was called.
Examples
Used to determine which module called this module containing cgWhoCalledMe::
   IDL> Print, cgWhoCalledMe()
   ; Compile and run the following main level program.
   ;***************************
   PRO junker
      Print, cgWhoCalledMe()
   END
   PRO junk
      Print, cgWhoCalledMe()
   END
   junk
   END
   ;**************************
   IDL> .go
        $MAIN$
        JUNK
Author
FANNING SOFTWARE CONSULTING::
   David W. Fanning 
   1645 Sheely Drive
   Fort Collins, CO 80526 USA
   Phone: 970-221-0438
   E-mail: david@idlcoyote.com
   Coyote's Guide to IDL Programming: http://www.idlcoyote.com
History
Change History::
   Written, 16 January 2011. DWF. 
Copyright
Copyright (c) 2011, Fanning Software Consulting, Inc.