Améliorations!
- added language translation
- added width/height options for latex figures
- changed embedded html to be iframes, with lazy loading for reveal
slides - added titles and author for html and slides
- bibtexparser uses "link" rather than "url" key (fixed)
- fixed regex for headers (one or more # not zero or more)
- allow codecells with no outputs
- added ansi colors for latex listings
- added adjust box for resizing tables too wide to fit in page width