BSORT

       Function to sort data into ascending order, like a simple bubble sort.

       Original subscript order is maintained when values are equal (FIFO).
       (This differs from the IDL SORT routine alone, which may rearrange
       order for equal values)

       result = bsort( array, [ asort, /INFO, /REVERSE ] )

       Array - array to be sorted

       result - sort subscripts are returned as function value

       Asort - sorted array

       /REVERSE - if this keyword is set, and non-zero, then data is sorted
                 in descending order instead of ascending order.
       /INFO = optional keyword to cause brief message about # equal values.

       written by F. Varosi Oct.90:
       uses WHERE to find equal clumps, instead of looping with IF ( EQ ).
       compatible with string arrays, test for degenerate array
       20-MAY-1991     JKF/ACC via T AKE- return indexes if the array to
                       be sorted has all equal values.
       Aug - 91  Added  REVERSE keyword   W. Landsman
       Always return type LONG    W. Landsman     August 1994
       Converted to IDL V5.0   W. Landsman   September 1997

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