org.das2.datum.MonthDatumRange

DatumRange implementation that preserves month and year boundaries in the next() and previous() implementations. For example,

   dr= MonthDatumRange( [ 1999, 01, 01, 00, 00, 00, 0 ], [ 1999, 02, 01, 00, 00, 00, 0 ] )
   dr.toString() → "Jan 1999"
   dr= dr.next()
   dr.toString() → "Feb 1999"  ; a normal datumRange would simply advance 31 days.