#### DESCRIPTION #######################################################
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##   Weeds out data files based upon header fields.  Input directory  ##
##  left intact unless output directory is the input directory.       ##
##                                                                    ##
##  Menu driven.  Will ask the user for input.                        ##
##                                                                    ##
##   LAST EDITED: Nov. 23, 2007 at  2:04pm by Garrett Euler           ##
##   VERSION INFO:                                                    ##
##            4.1: fixed bug where equal input and output directories ##
##                 doesn't remove weeded files                        ##
##            4.0: create your own weed/unweed                        ##
##            3.1: accesses header info on the fly                    ##
##            3.0: rewrite with modules                               ##
##            2.2: checks and cleaning                                ##
##            2.1: presorts lists so that unsorted lists are          ##
##                 supported as long as the entries are the same.     ##
##            2.0: bugfixes and fix for geometry format               ##
##            1.1: added arrival timing weed options and this         ##
##                 helpful feature.                                   ##
##            1.0: initial version                                    ##
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#### USAGE #############################################################
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##  Command line input:                                               ##
##     weed.pl in_data_dir new_data_dir                               ##
##                                                                    ##
##     where:                                                         ##
##        *in_data_dir - input data directory                         ##
##        *new_data_dir - output directory for the weeded dataset     ##
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