Tidied up -accept-output `feature\', should now work better.

Don't try to generate stdout files if using -accept-output.  It didn't
work anyway: a call to pop had stomped on the variable containing the
filename before it was used, setting it to the empty string.  The call
to touch then failed with a syntax error.

This behaviour seems more useful: sometimes you really don't want to
check the stdout and/or stderr, so you just don't create the file.

With -accept-output, create stdout&stderr dump files if does not exist

documented -accept-output

new option: -accept-output

2.03 update

Use eval exec .. trick rather than #!

Major update to more-or-less 2.02

New Build System!