layers (apart from the fact that contacts are output as magic's
contact layer representation, and not as cuts; this still needs to
be handled properly).
discovered that not all LEF/DEF rectangle coordinates are in
canonical order. Took the opportunity to update the LefError()
routine with an additional argument so that it can separate
errors, warnings, and informational messages, and will correctly
state whether the output is for a LEF or DEF read operation.
Tim 'mithro' Ansell
Tim Edwards