added default_url on html read, because of when saving to pdf with ralative link, it raises exception
if default_url is None return just url
callback function instead default_url
Basic Image support for RTF
Basic Image support for RTF
Basic Image support for RTF
Fixes image sizes and adds example
Merge pull request #19 from watercrossing/ImageSupportRTF

Image support for rtf documents -- thanks, watercrossing!
Merge pull request #18 from Sets88/master

Added callback function to xhtml reader, which could be used to make absolute paths
Add support for nosupersub
Minor cosmetics
Merge pull request #20 from watercrossing/SuperscriptFix

Superscript fix