Code now should be able to better handle Base64-encoded data in URI's.  It also turns out that CSS values in () may also need to kept in their original case as quotation marks are not required.

Verified to work at http://www.jpetermugaas.com/ .
Merge pull request #55 from JPeterMugaas/HtmlViewer11

Code now should be able to better handle Base64-encoded data in URI's.  ...