This release fixes major logic errors in integration of backward problems. Logic in CVSetTqBDF has beenn changed to avoid a divide by zero. Linear solver memory is set to zero after being created. Linear solver memory is freed on an error return. A memory leak has bee fixed in two IDASp***Free functions. This release fixes conditionals on loading divided difference arrays for a possible order increase. It fixes bugs in updating the solution vector, updating the linesearch parameter, and a missing error return. There are other assorted bugfixes.
