Fixed usage of escaped unicode in the CSS content.

p { text-replace: "Z" "\\u1234"; } should work (again?).

Updated the documentation.
When title is empty, do not print the header content in the epub table
of content. It's a way to tell epubmaker to ignore that header.
Sort lang/xmllang lists
Add more abbreviations to skip when looking for commas instead of dots.
When inline style is found, display inline style too with tag.
Added more words that do not indicate a footnote.