Code movement.  No functional changes.
Add --report-file option.
Don't output reason if #f.
Do output to a new *test-output* stream instead of special 'format functions'.
Separate testworks module into public and internal modules.
Rename %check* to do-check*.
Fix bug in check-equal macro.
Implement check-equal-failure-detail methods for collections and sequences.
Merge pull request #15 from cgay/simplify

Simplify