Version 0.8
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- Add support for the chalkboard plugin


Version 0.7
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- Update to reveal.js 3.3

- Push slide changes to browser history

- Respect slide_level option

- Support for zoom, search, and notes reveal.js plugins

- Ability to specify slideNumber reveal_option as either string or boolean


Version 0.6
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- Fix issue with missing embedded fonts for beige, league, and 
  solarized themes.


Version 0.5
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- Initial relase to CRAN