Don't do any delays if delay time is 0 (allows authors to go back to original functionality, if desired).  Issue #872.
Fix problem with percentage width being used too many times in HTML-CSS output.  Resolves issue #832.
Fix scaling of unknown characters to handle 'Scale All Math' values properly.  Issue #826.
Merge branch 'issue832' into develop.  Issue #832.
Merge branch 'issue826' into develop.  Issue #826.